rare old time
old-fashioned An exceptionally pleasant, enjoyable, and amusing time. We always have a rare old time when the Smiths come over for a dinner party. We must do it again soon. You should come to the party on Saturday—it's sure to be a rare old time!
rare old time
n. a fine and enjoyable time at a party or something similar. (Folksy.) That was a rare old time at Tom’s the other night.