GMT closing event?

There will probably be a closing event, and i know that TU will be released at somewhere around 23:00 gmt on uh… friday? (and i will stay up, duck you timezones) but when does the actual event in gmt start? i would like to record a lot of it and put it on a video just like i did when lobby 1 closed but because of timezones the event will be at night for me, so i need to know when the event in gmt starts approximately so i can prepare and maybe sleep in advance.