Pick'em is a game where participants predict the winner of every matchup on the picking schedule. Points accumulate for every correct prediction.
OfficePools employs a rolling deadline for Pick'em. This means that the cutoff is based on the individual game. In football, poolies can make their Thursday night game mid-week, and then come back to the pool on the weekend to make their picks for the rest of the week. Picks can be changed right up until the start of the respective game.