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by msoad 4214 days ago
Fun fact:

The arabic calendar which is based on Moon movements used to have an extra month every four(?) years to adjust the season changes. It was called Nasi' month. But after a Quran Sura published that prohibited this month Arabic calendar lost it's accuracy for seasons.[1]

The Iranian Calendar that is based on sun movements was safe from this Sura because it didn't have an extra month but an extra day each five years.[2]

[1] http://en.wikipedia.org/wiki/Nasi%27

[2] http://en.wikipedia.org/wiki/Iranian_calendars

1 comments

The Hebrew calendar (also lunar) still does this - a leap month in (IIRC) 7 out of every 19 years.