Though the approximation of 365 1⁄4 times to its tropical season was famous for years [11] early solar calendars had utilized significantly less exact spans, leading in slow misalignment of this calendar together with all the seasons.
Even the octaeteris, also a cycle of 8 years popularised by Cleostratus (and commonly credited to Eudoxus) that has been found in several ancient Greek calendars,” especially at Athens, is 1.53 times more than 8 Julian a long time.

The duration of two decades at the cycle of Meton has been 6,940 weeks, 6 months longer compared to the average Julian calendar year old.