Haynadurian calendar
The Haynadurian calendar is a moon calendar made of 18 months divided into 18 days, for a total of 324 days, making it shorter than the sunnean year by 7 days.
The Haynadurian calendar is a moon calendar made of 18 months divided into 18 days, for a total of 324 days, making it shorter than the sunnean year by 7 days.