English: Illustrates how the leap year in the Jalaali calendar works. Charts the amount of time from the beginning of the year (12:00am, 1 Farvadin, Tehran time) and the spring equinox for each year from A.D. 1750 to A.D. 2250 (Jalaali 1129-1629). Lengths of leap year cycles are indicated with by brackets below graph.
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