1. What unusual feature do you notice in the 15-letter word "uncopyrightable"?

2. In any given year, Christmas Eve and New Year's Eve are always on the same day of the week. But Christmas Day and New Year's Day are not. Do you know why?

3. A person's birthdays are exactly one year apart, right? So why is my birthday on Monday in one year and on Tuesday in the next year?

4. How many possible calendar arrangements are there?

Answers:

1. No letter is repeated.

2. The day after New Year's Eve in any given year is the first day of the next year.

3. 365 divided by 7 equals 52 Remainder 1. That remainder 1 is why your birthday advances one day each year (and two days in a leap year).

4. Fourteen ......... one beginning on each day of the week in each regular year, and the same for leap years.