7th Day Market on a Thursday

Make sure your computer clock is right? The quest lightbulbs show up based on computer time, so if your computer says it's Saturday the game pops them up (you can't complete it because the server time knows it is not Saturday).

Okay, that fixed it. Not sure why (probably my sister, because she's always the one messing up my computer), but my calendar was set to April 18th instead of march >_<