Submitted by Slokkkk t3_11dm4k6 in explainlikeimfive
Erablian t1_jabcrc5 wrote
Reply to comment by annomandaris in Eli5: How did people know how long a year was in olden times? by Slokkkk
The synodic month averages 29.53 days, quite a bit different from your 28-day month. After 13 of those, your calendar would be 9.6 days out of sync with the actual phase of the moon.
13 synodic months is about 384 days, not 364.
Viewing a single comment thread. View all comments