Specifically, note the first digit of this number. For example, if you have 400 friends, the leading digit is 4, and if you have 79, it's 7. Let's say we asked many people to do this.

For example, January 1st, 1999 is 99001 in Julian format. Many older applications store dates like this, and while Excel doesn't recognize this date format by default, that can be solved with a ...