This forum tells me that is uses GMT, no matter what time of the year it is!
If you click 'member center' at the top of the page, there is a link on the side menu to alter your 'Time Settings' each member can save the time offset so that all times on the forum relate to where you are in the world, clever ..eh!! lol
For us in the UK, it just needs the 'Daylight Saving' box ticked
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