A group of blondes walk into a bar. One of the women tells the bartender to line up a row of drinks for all of them. The gals lift their glasses and toast, "Here's to 51 days!" and they proceed to down their drinks.

Once again, they tell the bartender to "line 'em up", and again they toast to 51 days and down their drinks.

The bartender said, "I don't get it. Why in the world are you toasting to 51 days?"

One of the blondes explained, "We just finished a jigsaw puzzle that had written on the box 2-4 years and we finished it in 51 days".