Historical Note on $12$ (Twelve)
There are many occurrences of the number $12$ in various cultures in history:
- There are $12$ signs of the Zodiac, divided into $3$ sets of $4$ each, and categorising them another way, into $4$ sets of $3$ each.
- There are $12$ hours in each day and in each night.
- There were $12$ pence in $1$ shilling in pre-decimal British coinage.