Board Thread:Support Requests - Getting Started/@comment-27242792-20130910013826/@comment-1330470-20130911013617

CzechOut wrote: You can't game the system by changing your computer's time zone, or your account's timezone. Achievements are based on UTC for reasons of fairness. A day is 0000 to 2359 UTC as measured by Wikia's servers. Period. No trickity tricking that. A day must be precisely 24 hours, as reckoned by a neutral observer, for the badge to have any validity whatsoever.

A good way to help you not lose track of time is to install a UTC clock on your wiki. Or you could just remember to make one edit at the same time in your local time zone every day. See Admin Central:Guide to Achievements for more.

I'd advise simply making sure less than 24 hours pass between each edit: I've seen cases where a user made edits in roughly the same time, yet more than 24 hours apart - of course, one full midnight-to-midnight UTC day happened to fall in between the edits.

To be clear, you can wait more than 24 hours between edits, as long as one full midnight-to-midnight day does not fall in between the edits. It's useful to recognize where UTC will roll over in your local time zone - in my time zone it's about 6 PM. But give it lots of leeway, 'cause a lot is at stake!