If no issues are found with the new seed then it could well get bumped to final status and released. Personally speaking, if I've seeded a release then I'd want to wait at least a week so that reports can get in, just to make sure nothing else has crept in.
If I had to pick a day, I'd go with Monday/Tuesday, but it depends on your support status, if you're 24/7 then you'll have cover at the weekend if you release on a Friday, otherwise, people could install and get no response until Monday if there is a problem, and 48 hours can seem an eternity when you have problems.