<p>Adding as an official answer since we've had a handful of reports about this.  Best we can tell it's a bug in Firefox that happens when you live in a non-UTC timezone.  There are several Date related bugs in Mozilla's bug tracker, but this one looks to be the most relevant: <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1227499" rel="nofollow">https://bugzilla.mozilla.org/show_bug.cgi?id=1227499</a></p>

CC BY-SA 3.0
2016-05-11T16:18:36.630Z
2016-05-11T16:18:36.630Z
Brad Bell
<p>When I edit an existing entry the post date jumps ahead by an hour meaning I have to manually remove it before saving the changes.</p>

<p>I thought it may have something to do with the timezone but this is set to the correct timezone.</p>

<p>Has anyone come across this?</p>

CC BY-SA 3.0
2016-05-11T11:39:41.200Z
Yes! Is it in Firefox? And are you in a timezone that is not UTC? If so (like me) then it will jump by the offset I think. It is essentially a bug with FF (https://bugzilla.mozilla.org/show_bug.cgi?id=1227499) because if you type `new Date()` into the console of FF you get the wrong time there.
Josh Angell
CC BY-SA 3.0
2016-05-11T12:14:07.910Z
Yes I'm using FF and I'm set to the London timezone. I'm going to test it out on chrome! Thanks for the link
JRW
CC BY-SA 3.0
2016-05-11T12:49:36.783Z
No worries! Yes I chatted with Brad of P&T and we just agreed to not use FF ...
Josh Angell
CC BY-SA 3.0
2016-05-11T14:32:46.667Z
Ran into this too. It's a very strange bug in FireFox. Even in the latest version  - 46.0.1. Just as well there are other decent browsers about.
John Macpherson
<postdate>
postDate keeps jumping ahead when editing an entry
# postDate keeps jumping ahead when editing an entry

(Asked by: username_0 on 2016-05-11)

When I edit an existing entry the post date jumps ahead by an hour meaning I have to manually remove it before saving the changes.

I thought it may have something to do with the timezone but this is set to the correct timezone.

Has anyone come across this?

**Tags:** postdate
> **Comments:**
> **username_1**: Yes! Is it in Firefox? And are you in a timezone that is not UTC? If so (like me) then it will jump by the offset I think. It is essentially a bug with FF (https://bugzilla.mozilla.org/show_bug.cgi?id=1227499) because if you type `new Date()` into the console of FF you get the wrong time there.  
> **username_0**: Yes I'm using FF and I'm set to the London timezone. I'm going to test it out on chrome! Thanks for the link  
> **username_1**: No worries! Yes I chatted with Brad of P&T and we just agreed to not use FF ...  
> **username_2**: Ran into this too. It's a very strange bug in FireFox. Even in the latest version  - 46.0.1. Just as well there are other decent browsers about.  

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## 1 answers

### Answer by username_3 on 2016-05-11. Score: 2 | Accepted answer

Adding as an official answer since we've had a handful of reports about this. Best we can tell it's a bug in Firefox that happens when you live in a non-UTC timezone. There are several Date related bugs in Mozilla's bug tracker, but this one looks to be the most relevant: <https://bugzilla.mozilla.org/show_bug.cgi?id=1227499>


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