The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 50 | next 50) (20 | 50 | 100 | 250 | 500)- 10+1 (2 members)
- 10-day week (14 members)
- 10-month calendars (7 members)
- 11+1 (0 members)
- 11-month calendars (3 members)
- 12+1 (11 members)
- 12-month calendars (72 members)
- 128-year leap cycle (6 members)
- 13*28 (29 members)
- 13*4 (1 member)
- 13+1 (2 members)
- 13-month calendars (12 members)
- 14+1 (1 member)
- 14-month calendars (4 members)
- 1689-year leap cycle (1 member)
- 18-day month calendars (1 member)
- 19-year leap cycle (3 members)
- 20-month calendars (1 member)
- 231-year leap cycle (1 member)
- 26-day calendars (0 members)
- 26-day month calendars (2 members)
- 27-30-day calendars (0 members)
- 27-30-day month calendars (1 member)
- 27-day month (0 members)
- 27-day month calendars (3 members)
- 27-day months (2 members)
- 28-35-day month calendars (10 members)
- 28-day month (0 members)
- 28-day month calendars (8 members)
- 28-day months (2 members)
- 28-year leap cycle (3 members)
- 2800-year leap cycle (1 member)
- 29-30-day month calendars (9 members)
- 29-31-day month calendars (1 member)
- 29-day month (0 members)
- 29-day months (2 members)
- 293-year leap cycle (13 members)
- 29:30 (2 members)
- 3-day week (4 members)
- 30-31-day month calendars (12 members)
- 30-33-day month calendars (1 member)
- 30-day month (0 members)
- 30-day month calendars (27 members)
- 30-day months (5 members)
- 30:29 (3 members)
- 30:30:31 (15 members)
- 30:31 (4 members)
- 30:31:30 (4 members)
- 30:31 mirrored (0 members)
- 31-day month (0 members)
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