The time to work on your game ends tonight at 7pm UTC for ranked entries. After that time, you have one additional "submission hour" to build your game and submit it to the site. Be careful, because so the submission of ranked entries will be effectively closed at 8pm UTC.
Voting will start right after the submission hour, so if you are looking forward to play some games, you can do so right away.
Unranked jammers have additional 24 hours ( + submission hour) so for them the doors close on Monday at 9pm UTC.