Tuesday! The polls are open from 6:30 AM until 7:30 PM on Election Day.
Search for yourself at the Board of Elections website:
to find your polling place.
If you have a little extra time, stand by the sign for the candidate of choice (me, I hope) and encourage other voters to support them. The political parties will have a sign for each of their candidates at all the polling places, so there should be a sign for you to stand by. Just don't say anything to folks once you get past the signs-- election law forbids it.