PHP date + 1 year is returning a date slightly less than 1 year

Asked Sep 27 '21 at 21:25

Active Sep 27 '21 at 21:25

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I've coded a user membership plugin which is supposed to generate a membership expiry date for the member to be 1 year from the date that they sign up. To calculate this date I have the following line of code:

$oneYearOn = date('Y-m-d',strtotime(date('Y-m-d', time()) . ' + 1 year'));

However, in some instances, this seems to be returning a date slightly less than 1 year. For example, we just had a member sign up on 2021-09-27, but the expiry date got set to 2022-09-15. 12 days short of what it should be.

Any ideas why this has happened?

asked Sep 27 '21 at 21:25

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Hi ! Does it answer to your question or not ? https://stackoverflow.com/a/14524760/4698373 – Philippe Sep 27 '21 at 21:32
I can't reproduce the problem. – Barmar Sep 27 '21 at 21:32
I don't see how you could lose 12 days except if the year were 1752, when much of the world switched from the Julian to Gregorian calendar. – Barmar Sep 27 '21 at 21:45

PHP date + 1 year is returning a date slightly less than 1 year

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