The new cement floor in the basement, November 30th.
The pour was Wednesday, November 28th. We got some cure-n-seal on Thursday after the kids' dental visit (no cavities!) and I sprayed it on that afternoon. It rained that night, and you can see the water beading up except for in front of the can where I ran out. We got another half gallon (from a different source) and painted that spot Saturday afternoon.