Dates of the maisl are wrong

[NI0X]

I installed der roundcube on my webserver.
It's really a very nice webmail I think!
But I saw that the dates of the Mails are totally wrong.
On the first picture you can see a screenshot from roundcube, on the second one you can see a screenshot from thunderbird where the dates are showed correctly.

And I saw dem Demo of Roundcube (http://roundcubeforum.net/forum/index.php?topic=21.0):
There you can sort the mail by clicking the arrows, that's not in my Version

Can someone help me?

[SKaero]

I see nothing wrong the email in the pictures are not the same emails.

[NI0X]

Yes of course...
The Mails in roundcube have totaly wrong dates!
It sorts rightly, but the dates of Thunderbird are correct.
An yes: It's the same mail-address

[SKaero]

OK, have you checked the timezone?