Dulic calendar
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The Dulic calendar is a calendar used in Upper Boroso. It is a solar calendar, and is divided into 4 seasons, each containing 10 9-week days. New Year is always on the southern hemisphere vernal equinox (usually September 22 or 23).
Every second year, an extra nine-day week is added at the end of winter. Every twelve years, an additional nine-day week is added at the end of summer. Every 400 years, the additional twelfth-year week is only eight days.
Seasons
| Meta Name | Gregorian | Proto-Upper Borosan | Weeks |
|---|---|---|---|
| Spring | 22 September - 20 December | ||
| Summer | 21 December - 20 March | ||
| Autumn | 21 March - 18 June | ||
| Winter | 19 June - 16 September (odd years) 19 June - 21 September (even years) |