An experimental calendar library with a focus on extensibility and performance. As of now, we are only interested in arithmetical calendars.
We restrict ourselves to calendars supposedly in use today:
- Armenian
- Coptic
- Ethiopic
- Gregorian
- Julian
- Tabular Islamic
- Zoroastrian
NB: most computer implementations of calendars with epagomenal days add a thirteen month to hold them, we don't, but see below if you don't agree.
One can create new calendars from a schema and an epoch
(see Zorglub.Calendars.Specialized).
Below, 12+1 means 12 months plus a virtual thirteenth month.
Arithmetical schemas:
- Coptic (12 or 12+1 months)
- Egyptian (12 or 12+1 months)
- Gregorian
- Julian
- Tabular Islamic Arithmetisation of astronomical schemas:
- French Republican (12 or 12+1 months)
- Persian Reforms:
- Tropicália (three versions)
For one reason or another, most proposed reforms are considered defective and therefore have seen limited adoption, if any.
For the sole purpose of validating the API, we would like to have at least one schema in each category.
- Embolismic schemas:
- Hebrew (*)
- Perennial blank-day schemas:
- International Fixed (*)
- Positivist aka Georgian (*)
- World aka Universal (*)
- Perennial leap-week schemas (see also Reform.md in
Zorglub.Sketches):- Pax (*)
- ISO
- Astronomical schemas:
- Persian (Solar Hijri)
- French Revolutionary
- Badi
- Chinese
- Vietnamese
- Other types of schemas:
- Julian-Gregorian, an hybrid schema (*)
- Pataphysical, an imaginary schema
- Tolkian
- Masonic, almost identical to the Gregorian calendar: a year starts the 1st of March and it uses the Anno Lucis.
- etc.
(*) A prototype can be found in Zorglub.Sketches.