The annual calendar is as follows:
1 Span = 6 Days
1 Moon = 6 Span = 36 Days
Standard Year (odd numbered years) = 10 Months = 360 Days
Leap Year (even numbered years) = 11 Month (1 leap month of 24 days) = 384 Days
1 Solar Year = 372 Days
The calendar is based on the lunar cycles.
Seasons: Planetary axis nearly perpendicular to ecliptic, so minimal seasonality.