Click the green flag! If the clocks become out of sync, press the green flag again, wait a couple of seconds, or reload the page. Hopefully it shouldn't though!
Firstly, thank you for looking ;) So far, I have three types of clock: Analogue (the actual clock), Digital (the numbers) and Hexadecimal (The colour in the background). This works in any time zone! (I feel good now I've written that...) Have I missed a type of clock? Comment and I'll add it in!