Basilicus
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This article has content related to Cresia.

The Iscran calendar is a nonstandard system of timekeeping on Iscra. The official system of timekeeping is Derived Time (DT), required on all official documents. However, the Iscran calendar and Iscran Time (IT) is used for everyday life.

The tropical year of Iscra is 668.224520326 dd, and its solar day 13.810629815 dh. Thus, there are 483.847970199 solar days in a tropical year, or about 241,924 days in 500 years. Any year that is divisible by 5 is a non-leap year, unless it is also divisible by 20, unless it is also divisible by 500, which results in 76 non-leap years per 500 years. A non-leap year has 483 days, and a leap year has 484 days.

The Iscran calendar has 10 months of 48 or 49 days and ten-day weeks. The tradition of ten-day weeks carried over from the Old Cresian calendar. Odd-numbered months have 48 days, while even-numbered months have 47 days. However, a 49th day is added to the tenth month on leap years.

5-49 is considered the midyear's day.

1 2 3 4 5 6 7 8 9 10
48 48 49 48 49 48 48 49 48 48 (49)

An example of a month starting on C1:

Month
C S R V L
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
41 42 43 44 45
46 47 48 (49)
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