Yes there is always this problem. Also on the 28th of the is month the clocks go back in UK.
SO I use this:
http://www.timeanddate.com/worldcloc...3&p2=179&p3=70
For those in the "Storm of War Campaigns" steam group you will get a reminder if you are on Steam. Also you can check the time against your local time and calculations are done for you.
I highly suggest your use the steam group.
To join the group,
click "community" at the top,
then "groups" on the right.
Under your name are three blue headings, click browse groups,
Top right you will see a window that reads Search players and groups
Search for:
"SoWCs"
The emblem for the group is 3 stuka.