Below is the list of calendars covered on Calendar Saga. Calendars that could not be covered in time were removed from the list (African, Byzantine, Hopi, Native American and Orthodox calendars).
- Ancient Egyptian
- Armenian
- Aztec
- Mesopotamian (Assyrian, Babylonian and Chaldean)
- Bahá'í
- Balinese
- Berber
- Celtic (Gaulish)
- Chinese
- Coptic
- Essenic
- Ethiopian
- French Republican
- Greek (Attic)
- Greek (Macedonian)
- Gregorian
- Hebrew Jewish
- Hindu
- Hopi (horizon calendars)
- Inca
- Indonesian (excluding Balinese)
- Indonesian Balinese
- Inuit
- Japanese
- Julian
- Liturgical (ecclesiastical computus)
- Malagasy
- Martian
- Maya
- Muslim
- Old English + from Bede to Tolkien
- Persian (Iranian)
- Pre-Julian Roman
- Reform: fixed calendars
- Reform: perpetual calendars
- Thai
- Tibetan
- Umitte
- Viking
- Zoroastrian
