2digit.org

"The Eleventh Hour": an expression meaning "at the last possible moment". It comes from a passage in the bible which is famously difficult to interpret.

The number of jurors on a jury, as seen here in 12 Angry Men.

Dalmatians User was banned for this post. ...jk but fr wtf does this mean

Fun fact: those swords they let you play with in elementary school actually had 12 markings on them.

Dozen: For some reason we have a whole extra word for twelve, and if you say dozen instead of twelve or vice versa, people suspect you're an alien.

The unlucky number. (Friday the 13^th is especially unlucky.) Apparently you can get around the back luck by just refusing to label things with a 13, even if there are actually 13 of them.

Hexadecimal, or base 16, used to represent binary data in a semi-human-readable format.

2⁴ (or 2²²)

In Swedish, several numbers function as minor swear words. Vad i sjutton! literally means "what in seventeen", but it's more or less equivalent to "what the hell" in English. Others include tusan (thousand), but 17 is the only two-digit Swedish curse.

Finally, you can go see movies with violence, nudity, and more than one use of the F-word, without having to bring your parents. (Rated R)