It is probably not a very portable solution, but it seems to be working just fine in php 5. days. You can rate examples to help us improve the quality of examples. Is 1 if the interval represents a negative time period and 0 otherwise. Possibility to store a duration/time in a mysql datetime field. Calculate total seconds in PHP DateInterval. Example. Today we’re going to dissect the PHP DateInterval class, a power tool for dealing with dates in a web app. I get the start of this event and the duration to add to get the end. 7 does is more correct than PHP 8. As commented by @Álvaro González on my other answer that objects in many languages behave some what different than what we think when passing objects between different variables. js, Node. [2010-07-29 09:15 UTC] rasmus@php. PHP DateInterval calculation number of months incorrect Since the PHP timezone was changed in a project, DateTime::diff does not longer calculate the number of months between two dates correctly. Hot Network Questions Tricky Integral: Evaluating Renormalized Ultraviolet "Divergent" IntegralHere are some simple examples. One thing to know is that the dates and times can be represented in three forms: a timestamp (i. A date interval stores either a fixed amount of time (in years, months, days, hours etc) or a relative time string in the format that DateTimeImmutable 's and DateTime 's constructors support. While, on the surface, echoing a date in the future brings a small bit of accomplishment, it can be quickly eradicated when one is tasked with. Value, dtpTimeOut. ), because, as per PHP manual, date: Returns a string formatted according to the given format. How to calculate the difference between 2 timestamps in PHP. This P stands for the period. is not coercible to. Here's an example of the datetime strings I am working with: Tue May 15 10:14:30 +0000 2012. PHP DateInterval not returning last day of the month. 在学习解决方案之前，我们先来了解一下 date ()的. here is my code so far (does. 9, where 9 months will become 0. . 2 branch of PHP ceased to be supported in August last year. Weitere Informationen finden Sie in der DateInterval-Dokumentation. Sorted by: 4. The period designations are single character. 0. Calculated date is before 00:00:00 on January 1 of the year 1, or later than 23:59:59 on December 31, 9999. You also need to call ->format('%d') where you're building the sql statement. DateTime::add — Modifies a DateTime object, with added amount of days, months, years, hours, minutes and seconds. 2. If its not the first day of the week get the first day of that week with strtotime "last sunday" (or monday) for the first date. I don't want to use cron on Linux/Unix/BSD box or Scheduled Tasks on Windows. Table of Contents. Ein DateInterval-Objekt Rückgabewerte. PHP - total number of days is not an integer. I also attempted to do it in a way which would fail to preserve number. You will also have to use the letter T for intervals which contain a time component. We will further analyze their implementations. Why is date() returning the wrong month? 2. g. So, there are same moment will return 0. php dateinterval add hours minute add to time in php add 1 hour php DateInterval add 1 hour to date php hours minutes seconds php php add hour from a date php add 1. For example, P1D specifies 1 day. 3. So, sorry for not being clear. days: If the DateInterval object was created by DateTime::diff(), then this is the total number of days between the start and end dates. Before PHP 8. 5. PHP date interval - wrong month difference. I'm really stuck with adding X minutes to a datetime, after doing lots of google'ing and PHP manual reading, I don't seem to be getting anywhere. Si el objeto DateInterval se creó con DateTime::diff(), entonces es el número total de días entre las fechas de inicio y fin. Along the way, you'll learn all the most important skills for writing apps for the web: you'll get a chance to practice responding to GET and POST requests,. For example, if you want to allow the user to choose how often they receive a status email, they could use this field to choose intervals like every "10 minutes" or "3 days". 1. Like DateTimeImmutable::add() but works with DateTime . 0, PHP 7, PHP 8) DateTime::add-- date_add — Modifica um objeto DateTime, com adição de dias, meses, anos, horas, minutos e segundos. does not have F nor f similarly to DateInterval::format that supports split seconds. . Jan 29, 2024 00:00:00 Feb 15, 2024 01:00:00 Mar 03, 2024 02:00:00 Mar 20, 2024 03:00:00 Apr 06, 2024 04:00:00 Apr 23, 2024 05:00:00. How to create a DateInterval from a time string. It should actually be: 25:25The DateAdd function has a built-in calendar algorithm to prevent it from returning an invalid date. When getting the difference between two DateTime objects with fractions of seconds, DateTime::diff() works under PHP 7. 2. I am creating an online booking system. php; Share. 在 PHP 中使用 DateInterval 获取昨天的日期. In order to compare those two dates we use the method diff() of the first DateTime object with the second DateTime object as argument. Object : Specifies a DateTime object returned by date_create(). Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyHaving a look on the PHP documentation, the following two methods of the DateTime object would both seem to solve my problem:. 現在、PHP には、 date () 、 strtotime () をはじめとする関数と、PHP 5. interval A DateInterval object Return Values ¶ Returns the modified DateTime object for method chaining. In the case above, 12 x 3600 = 43200. Strictly it's doing the right thing, since your interval spec string specified zero minutes and hours, but it's definitely not helpful that it doesn't roll over excess seconds into minutes and hours. To format date you can use format () method on DateTime object. PHP Date: get every Friday at specific hour. The output when running the above code in PHP 8. Since the difference is 2 days, the hours property is 0, which is what you get. epoch time), a DateTime object, and a string. 0) Examples: Z or +02:00: T: Timezone abbreviation, if known; otherwise the GMT offset. 0. Finally, we subtracted those seconds from our timestamp and then printed out the result in a human friendly date format. The Duration::__construct method is private, as such, to instantiate a new Duration object use one of the following named. GetDecimalValue (), 2) IF FixEncodedHours > 8 then. PHP. The W3Schools online code editor allows you to edit code and view the result in your browserA Computer Science portal for geeks. I may convert the values of hours, minutes and seconds to zeroes. However, PHP 7. The date_sub() is an inbuilt function in PHP which is used to subtract some days, months, years, hours, minutes, and seconds from given date. 12-hour format of an hour without leading zeros: 1 through 12: G: 24-hour format of an hour without leading zeros: 0 through 23: h: 12-hour format of an hour with leading zeros:. The date_diff() is an inbuilt function in PHP which is used to calculate the difference between two dates. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1 day". The format starts with the letter P , for period. ), then the European d-m-y format is assumed. g. PHP. DateTime "first day of last month" not returning the first day. Calculate total seconds in PHP DateInterval. Otherwise. I am currently working at a system for a manufacturing company that monitors a daily output data, but the company follows a 24hours production duration which the date ends at 6:00 AM, but the standard PHP date/time change after 12:00 midnight,is it possible to change the PHP date/timestamp to change the current date after 6am?. 0. This function will return a DateInterval object on the success and returns FALSE on failure. SQL Server - Add seconds to time field. 0. DateTime::add() - Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object DateTime::diff() - Returns the difference between two DateTime objects DateTime::modify() - Alters the timestampAdds the specified DateInterval object to the specified DateTime object. DateTime. PHP Manual Function Reference Date and Time Related Extensions Date/Time DateTime Change language: Submit a Pull Request Report a Bug DateTime::sub date_sub (PHP. [2012-05-05 20:45 UTC] php at arjanonline dot net Description: ----- When I create a DateTime object from a (any) timestamp and then add a DateInterval object to the DateTime object, the time in the DateInterval object is added and one additional hour is also added. Here is the code to assist you in putting. Program 2: This program uses DateTime::sub () function to subtract the given interval from date object. The date time format I have is: 2011-11-17 05:05: year-month-day hour:minute. The next addition makes it go from 2 to 3, but as 3:00 only exists as non-DST,. DateTime::createFromImmutable — Returns new DateTime instance encapsulating the. Two seconds is PT2S. It is better to work with a Carbon object, like this :(PHP 5 >= 5. This function returns a new DateTime object. So, as. The default value of Date is 0:00:00 (midnight) on January 1, 0001. key 2048 openssl rsa -in private. For example: P3Y6M4DT12H30M5S. you can check the 'invert' property to see if the second date is before the first date or not. DateInterval::__construct. php date next month gives wrong day. How to create 1 hour between two dates in PHP? How to add P and T in dateinterval? How to get the correct number of hours between two dates? How can I get. The DateInterval object, returned by date_diff stores each period of time separately, seconds, minutes, hours, days, months and years. I also attempted to do it in a way which would fail to preserve number. . 3. We discussed PHP’s old version 5. What you can do with this function/method is a great example of the philosophy: "just because you can do it doesn't mean you should". These are the top rated real world PHP examples of DateInterval extracted from open source projects. If you are stuck in a position where all you have is the DateInterval, and you (like me) discover that there seems to be no way to get the total minutes, seconds or whatever of the interval, the solution is to create a DateTime at zero time, add the interval to it, and then get the resulting timestamp:Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyPHP has no operator overloading* so + with objects makes PHP trying it to convert them to string first, but DateInterval does not support that:. But time () return a Unix timestamp that is different from a MySQL DATETIME. 0. Real mails from my inbox. Whether you're preparing for your first job interview or aiming to upskill in. This works because there are exactly 3600 seconds in one hour (60 x 60 = 3600). The next addition makes it go from 2 to 3, but as 3:00 only exists as non-DST, the UTC offset than changes. This class’s constructor takes the given interval as a string that starts with P. seconds in PHP DateInterval. 0, PHP 7, PHP 8) Introduction ¶ Represents a date interval. For instance, to display the current date, filter the. Welcome back! If you're the original bug submitter. I use Codeigniter and it has the timespan() function that returns the time as 1 Year, 10 Months, 2 Weeks, 5 Days, 10 Hours, 16 Minutes. As of now I can compute the time difference between the two datetimes excluding the Saturdays and Sundays. Here, H represents the hours in 24-hour format (00 through 23), i represents the minutes (00 to 59), and s represents the seconds (00 through 59), all with leading zeros. How to add minutes to the time part of datetime. Changelog. days * 24 * 60 * 60 ); The calculation in the last step does not take into account the hours, minutes and seconds in the date difference (as they're not included in the %a format). 829S I appreciate. First, follow their installation instructions. 1. Viewed 102k times. If I add 1 month it will just add 1 on the month part and leave the day part (2011-01-15 will become 2011-02-15) If the day is not existing in the month we will end, we take the last existing day of it (2011-01-30 will become 2011-02-28)Method 1: Using date_diff () Function. 0. For example, 6 days, or 45 minutes. But it is more readable like that. Specifies a DateInterval object: Technical Details. Just an example to include the end date using the DateTime method 'modify'echo "<br>". DateInterval Class in PHP add days to date. This, ladies and gentlemen, was one instanceDateInterval can be used to create a new dateinterval object for our date calculation and uses in any script. How To's. NOTE: This approach does not work for intervals less than a day with time-zones that recognize DST, due to a known issue with dates and the DST hour changes. Like petros at rufunka dot com said, there is a difference of 1 hour between Europe/Berlin and UTC. How can I now add one hour to this date?Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyI want to send a reminder email. H - 24-hour format of an hour (00 to 23) h - 12-hour format of an hour with leading zeros (01 to 12) i - Minutes with leading zeros (00 to 59) s - Seconds with leading zeros (00 to 59) a - Lowercase Ante meridiem and Post meridiem (am or pm)PHP DateInterval::createFromDateString - 30 examples found. DatePeriod::getDateInterval. But the result is looks like the DateInterval function don't work as it should. I'm trying to subtract 15 minutes from the current time. The DATE_ADD () function may return a DATETIME value or a string, depending on the arguments: DATETIME if the first argument is a DATETIME value or if the interval value. Nota: . 1). Using DateTime::diff() function. 2. DateTime::sub() - Sustrae una cantidad de días, meses, años, horas, minutos y segundos de un objeto DateTime DateTime::diff() - Devuelve la diferencia entre dos objetos DateTime DateTime::modify() - Altera la marca temporal ＋add a note在 PHP 中使用 strtotime () 获取昨天的日期. In PHP, the DateInterval object exists to describe the duration of time. Both DateInterval('P1M') and strtotime("+1 month") are essentially blindly adding 31 days regardless of the number of days in the following month. DateTime::diff () - Returns the difference. I have a PHP variable that says: 07/05/2016. You can rate examples to help us improve the quality of examples. To get the time different in two timestamps you can simply minus the first timestamp from the second. B. PHP date next tuesday 1pm. Therefore it does not make sense to determine if a date coincides with an interval. Then I looping over every real DateInterval while performing an compound assignment operation (for example +=) on the desired property. 8 on Windows. Used Symbols. The difference is in the 'immutable' part, which means once the object is created it can never change (wiki for more info). El método DateInterval::format() no recalcula los excesos en cadenas de hora ni en segmentos de fecha. 注意: . Downvoted here too. Since OP said nothing about DST, i presume the last. PT6H: A period of six hours. DateTime::sub — Subtrahiert eine Anzahl von Tagen, Monaten, Jahren, Stunden, Minuten und Sekunden von einem DateTime-Objekt. I would like to calculate with PHP the start and end datetime of an event. EDIT #2: Since I cant answer my own question. Here is some example code to reproduce the problem: <pre&. Converting INT minutes to HOUR in SQL server. The Overflow BlogCreate a new ChronosInterval instance from specific values. 2 meant using date (), strtotime (), and other date related functions sometimes in convoluted ways to get to the date (s) you were looking for. are all variable. and massively easier and less hack-y than the "old" way of handling dates. We've also included a brief review of how to obtain date and time values and how to set a timezone for your PHP project. Output: 00-0-1 22:0:0 In this example we created two DateTime objects. For example, between today at 13:00 and tomorrow at 12:00, I should get 1 (day), even though the interval is less than 24 hours. You should call different time zone between them. properties of the DateInterval class and do. 0, PHP 7, PHP 8) DateTime::add-- date_add — Ändert ein DateTime-Objekt, wobei die Anzahl der Tage, Monate, Jahre, Stunden, Minuten und Sekunden hinzugefügt wird Beschreibung. 75. $current->add(new DateInterval("PT{$hoursToAdd}H")); //Format the new time into a more human-friendly format //and print it out. Apr 5, 2018 at 20:51-167 would show 1:00am as the time (which is the same result as the original expression from the question), not 11:00pm. The Date data type contains date values, time values, or date and time values. Introduction to the PHP DateTime class. How can I get month Interval in php using DateInterval. 3. Converting a DateInterval to variable integer in php. Have a look at this sample and. It will return false or -1 (depending on your PHP version) if the input isn't good, which could also screw up your loop. And converting months to seconds is complete nonsense. 3. 0. 1. Véase DateInterval::format(). P1Y2M3DT4H5M6S — 1 year 2 months 3 days 4 hours 5 minutes and 6 seconds. Otherwise. This is very useful when you need to describe the duration of time without taking into account when it should started or ended. These are the top rated real world PHP examples of DateInterval extracted from open source projects. This code starts every week on a thursday and ends on a wednesday. Improve this answer. NET data type is System. [PDF] A Comprehensive Guide to REDCap Project approvals will generally be granted within 1–2 business days (24–48 hours) of the request. This should be. 5. How To's. Quoting from PHP. DateInterval::invert will. There's DateInterval though, which handles date intervals. PHP DateInterval does not applied on DateTime object. PHP Manual - DateInterval. 2. Converting seconds into period of time. mktime alternative. Last day of previous months calculating wrong. (decimal point). Jan 29, 2024 00:00:00 Feb 01, 2024 01:00:00 Feb 04, 2024 02:00:00 Feb 07, 2024 03:00:00 Feb. 3 build (at least on Windows, it always returns the same 6015 value). The form element collects year, month, day, hour, minute and seconds, and by passing the #granularity, the developer can select which time elements should be included. (For example in PHP, strtotime() will ignore DST, and report that between the midnights of the last Saturday of October and that of the following Monday, exactly 2 * 24 * 60 * 60 seconds have passed, even if that is plainly not true. I'm sure I could come up with a solution by brute force if necessary, but I'm. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. A minute may span 59, 60, or 61 seconds, an hour may contain 3599, 3600, or 3601 seconds. EditBelow programs illustrate the DateTime::sub () function in PHP: Program 1: This program uses DateTime::sub () function to subtract 2 days from given date object. For example, if you only are interested in hour difference, and you know that difference can't be more than 24 hours, then use only %H. The procedural version takes the DateTime object as its first argument. In order to compare those two dates we use the method diff() of the first. Working with Dates and Times prior to PHP 5. 0) Examples: Z or +02:00: T: Timezone abbreviation, if known; otherwise the GMT offset. – Stefan Gehrig. DatePeriod::getEndDate — Gets the end date. 0. Here is an example: This will output "12-2021". How to add 25 minutes in 2 hours-1. I don't want to use cron on Linux/Unix/BSD box or Scheduled Tasks on Windows. time (): int. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyDateInterval::__construct. Improve this question. Syntax: Object oriented style:Summary: in this tutorial, you’ll learn how to work with the date and time in an object-oriented way. DateTimeImmutable::sub() - Subtracts an amount of days, months, years, hours, minutes and seconds DateTimeImmutable::diff() - Returns the difference between two DateTime objects DateTimeImmutable::modify() - Creates a new object with modified timestamp ＋add a noteDate Formats ¶. Featured on Meta Update: New Colors Launched. echo date('Y-m-d', strtotime("+30 days")); strtotime. Adding a DateInterval of 1 day to a DateTime set at midnight results in a DateTime set to 1:00 AM. PHP DateInterval select days of week every x weeks. If the duration contains time elements, that portion of the specification is preceded by the letter T. Welcome to part two of Hell is Programming a Calendar, where I will dive into some of the more nitty-gritty details about handling time specifically in Drupal. DateTime::sub () - Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object. If you do something like DateAdd(DateInterval. You can rate examples to help us. I believe this involves converting the string to a date object. glad that it helped :) – macghriogair. – marknt15. However, this only works if the number of seconds is less than 86400, i. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1 day". 5. 3. ,It looks like PHP 5. I've read the documentation and don't quite understand how it works. date_diff produces a DateInterval type, which can't be used as a string - that's why you need to call ->format on it when you echo it. It also provides the static method, which accepts the input strings and sets up a DateInterval from the input string. (available as of PHP 8. 3. Is there a way of doing this without recursion, perhaps using DateInterval? N. Just to expand on previous answers, a function to do this could work like this (changing the time and interval formats however you like them according to this for function. DateTime::__construct — Returns new DateTime object. At a minimum I need the code to understand weekends, but ideally it should account for US federal holidays as well. Dim FixEncodedHours As Decimal. My goal was to create a list of times between like 10:00 and 14:00 with 15 minute intervals. Large collection of code snippets for HTML, CSS and JavaScript. The foreach cycle goes at first through years, then months, then days, etc. itself is not changed in the calling program. Thanks again – Eric Evans. I don't have the time to look into this at the moment but I hope this points you in the right direction. PHP: DateInterval # Adds 7 days to the project launch. expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now, or the current time if now is not supplied. 2. $string = '1/1/2016 11. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyCareers. x as the 5. Follow. The naive approach is to do something like this:DateTime is part of PHP >= 5. DateTime::__construct — Returns new DateTime object. Three refreshes right now at 9:51pm give the following results: 2013-03-26 09:09:03, 2013-03-26 09:17:03, 2013-03-26 09:30:03This is a direct port of the code that PHP uses internally to calculate ranges, with the exception that it doesn't take daylight savings time into account. Then, create a DatePeriod with this information, and iterate over it to show the resulting times:Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyCarbon 是php的日期处理类库（A simple PHP API extension for DateTime. For your case you need to go with PT3M for 3 minute addition. Then, when converting from seconds, it would divide in that order, each time taking the modulo of the previous operation, until only <60. A DateInterval can be constructed using either the class’ constructor or by using the static method createFromDateString. Here is my attempt to add an hour onto it: $time = 'Tue May 15 10:14:30 +0000 2012'; $dt = new DateTime ($time); $dt->add (new DateInterval ('P1h')); The DateInterval class ¶ (PHP 5 >= 5. 3, I suppose any such conversion function would know how many seconds are in a year, a month, a day, an hour, and a minute. This is a great answer to this question, but I also just want to say, to anyone reading this, it's well worth your time to learn how to use them if. S is the second designator that follows the value for the number of seconds. Aye, the method, how you can fix this also simple, create an another DateTime object, modify to the first day, then create a new DateTime object from the. ; DateTime::getTimestamp: Get the UNIX timestampt and compare those. I've been deciding to get these values from datetime variable and subtract the time interval. This is an end result. The following happens internally: +1 month increases the month number (originally 1) by one. You do it with: date ("Y-m-d H:i:s");And vice versa. This is what I tried first and days cannot be set when the interval is created from diff, that's why we currently have the exception 'Can not instance a DateInterval object created from DateTime::diff(). Return Value: Returns a DateTime object on success. Examples with filter:Possible Duplicate: Get timestamp of today and yesterday in php I was wondering if there was a simple way of getting yesterday's date through this format: date("F j, Y");``` Dates in the m/d/y or d-m-y formats are disambiguated by looking at the separator between the various components: if the separator is a slash (/), then the American m/d/y is assumed; whereas if the separator is a dash (-) or a dot (. See DateTime , DateTime::sub , and DateInterval in the PHP manual. ) and it returns me an anterior date according to this period of time given. 3600 seconds earlier is that timestamp minus one hour. But it's not referenced on date_format, DateTime::diff, DateTime::format, DateInterval, and a host of general Date/Time functions. 0, PHP 7, PHP 8) Introduction ¶ Represents a date interval. A one-liner option is: echo date_create('2011-04-24')->modify('-1 days')->format('Y-m-d'); Running it on Online PHP Editor. about 5 seconds ago about 1 minute ago about 1 hour ago about 1 day ago about 1 month ago about 1 year ago---about 2 years ago. 3D P1DT1. The value for DateInterval could be changed In 'PT24H'. Two days is P2D. DateTime::createFromFormat — Parses a time string according to a specified format. -169 would show 11pm, and the date would be one day prior, so 8 days before. 3's DateInterval supports this. josh dot love at verizon dot net. Find centralized, trusted content and collaborate around the technologies you use most. INTERVAL expr unit is an interval value to be added to the starting date value. how do I subtract 24 hour from date time object in PHP. DateTime::createFromFormat — Parses a time string according to a specified format. The objective is very simple. I can easily trim the number of decimals by adjusting the string length parameter; here I use 4 to get milliseconds, but you could use 7 to get. And I don't mean by just a couple seconds like one would expect, I mean lots of minutes. As Carbon extends DateTime it inherit its methods such as diff() that take a second date object as argument and returns a DateInterval instance. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Six years and five minutes is P6YT5M. get php DateInterval in total 'minutes' 0. The format specifier is the same as supported by date, except when the filtered data is of type DateInterval, when the format must conform to DateInterval::format instead. See the formatting options for the date() function. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 4 only adds 3 days and 1 hour with each iteration while ignoring the 2 weeks period. We also provide diffAsCarbonInterval() act like diff() but returns a CarbonInterval instance. 00PM'; $date = new DateTime ($string); $interval = new DateInterval ('PT6H'); $date->add ($interval); // Now add another 6 hours while we are between 12:00 AM and 6:00 AM while ($date->format ('G') >= 0 && $date->format ('G') <= 6) { $date->add ($interval); } echo $date. Dynamically update date for days PHP.