Okay, new timeline.
Rounds will start and end at 22:00PM on Mondays, GMT. This gives you the weekend to submit your tasks and Monday to review them. The time for submitting Challenges ends exactly three days before then.
Voting Phases will start on Mondays with the start of the next round and end at 00:00AM on Sundays, GMT. This gives you Tuesday to Saturday to vote, but also means that nonBrawlers will have nothing to do on Sunday and Monday except pore over the spreadsheets and twiddle their thumbs because obviously Brawl supersedes all other obligations and activities planned.