Took this from the report a bug section, but wasn't sure if it was a bug so thought I better asked here first:

What steps will reproduce the problem?
1. In the Edit Item area. click on the publishing date.
2. Select any date.
3. Enter time example 02:00:00
4. Click save. Result: publishing time jumps to 03:00:00
5. Click save and close: time jumps another hour

What is the expected output? What do you see instead?
Expected output was for the publishing time to stay the same. What i saw was the time leaping forward one hour

What version of K2 and Joomla! are you using?
K2= 5.2.4
J!= 1.7.3