Every time I click "Save" on a K2 item, both creation and published dates go one day back. For example, I open an item whose dates are "2014-07-22", and when I click save, they become "2014-07-21". That goes on. More I edit and save, the date goes back one by one.

Timezone for Joomla, the users, .htaccess, and php.ini are all set to New York.

Everything is up to date, including Joomla and K2.

I searched this forum for the solution, but none of what I found helps.

Thank you in advance.

Which version of Joomla! and K2 are you using?
You might need to install the DEV version.

Like I said, everything is up to date.
Joomla 3.3.1 stable
K2 2.6.8 2/18/2014 release

I just installed K2 DEV edition. 2.7.0 - June 16th release.

The problem remains.

I still have this problem. Any suggestion?

I updated Joomla to the latest version and tried with K2 DEV again this morning, but no luck. Everytime I save an article, the dates of the article created and modified, goes back one day.

I also tried changing the timezone of the server to Denver since the server is physically located in Provo, UT, which is also in the same timezone with Denver. No luck. I changed it back to New York.

Tried "Discover" and fix DB, etc, but none of them fixed the issue.

I'd appreciated any help.

@htanabe

What's your current setup ? Joomla!/K2/PHP version? Any other extensions/plugins?

Joomla 3.3.6
K2 2.6.8 2/18/2014 release (also tried DEV that I downloaded this morning)
PHP 5.4

I also have an extension called "FW Real Estate". I disabled it, but the problem still remains.

Do you use a language other than English in the administration?

Yes, primary language of the site is Japanese.

I am talking about the administration language. Try to set it to English temporarily and see if the issue occurs .