# Christmas and Halloween

## Q: Why can't programmers tell the difference between Christmas and Halloween?

A: Because DEC25 = OCT31

**Explanation:**

DEC25 means Decimal 25 - so the number 25.

OCT31 means Octal 31 - which is 25 (for those who do not remember their
math, octal is base 8).

**Still confused? Well, lets count:**

DEC = OCT DEC = OCT DEC = OCT DEC = OCT 00 00 08 10 16 20 24 30 01 01 09 11 17 21 25 31 02 02 10 12 18 22 03 03 11 13 19 23 04 04 12 14 20 24 05 05 13 15 21 25 06 06 14 16 22 26 07 07 15 17 23 27