28/Historical Note

From ProofWiki
< 28
Jump to navigation Jump to search

Historical Note on $28$

There are approximately $28$ days in the lunar cycle.

This is probably the origin of the widespread cultural custom of splitting time both into $7$-day chunks called weeks, and also the year into $12$ approximately $28$-day chunks called months.

There are $28$ pounds avoirdupois in one quarter.