| Chinese | French Republic | General | General Hybrid | Gregorian | Hebrew |
| Islamic | Julian | ||||
| Code | Name | Description |
|---|---|---|
| General | ||
| jdn | Julian Day Number | The internal day count date representation used by the Glich Hics extension. A minor variation of the "Julian Day". |
| mjd | Modified Julian Day | A day count calendar scheme, a shorter version of the Julian Day. |
| rd | Rata Die | A day count calendar scheme, used in the book "Calendrical Calculations". |
| jwn | Julian Week Number | A 7 day week (Monday start) count calendar, analogous to the day count jdn calendar scheme. |
| jwsn | Julian Week (Sunday) Number | A 7 day week (Sunday start) count calendar, alternative to jwn calendar scheme. |
| Julian | ||
| j | Julian | The simplest version of the Julian calendar, includes year zero. As used in astronomy. |
| jce | Julian Common Era | A version of the Julian calendar commonly used by historians. Year is marked as BCE or CE. |
| jn | Julian Nativity | A Julian calendar with the year change on the preceding 25th December. |
| ja | Julian Annunciation Florence | A Julian calendar with the year change on the 25th March, calculus florentinus. |
| jap | Julian Annunciation Pisa | A Julian calendar with the year change on the preceding 25th March, calculus pisanus. |
| je | Julian Easter | A Julian calendar with the year change on Easter Sunday. |
| eh | Julian Era Hispanica | A Julian calendar with the epoch of 1st January -37. |
| Gregorian | ||
| g | Gregorian | The Gregorian calendar. |
| gw | Gregorian ISO Week | A Gregorian calendar with year, week in year and day of week. Based on the ISO:8601 standard. |
| go | Gregorian Ordinal | A Gregorian calendar with year and day of year. |
| roc | Republic of China | The Republic of China Gregorian calendar. |
| General Hybrid | ||
| ay | Astronomical Year | The Astronomical Year calendar. |
| French Republic | ||
| fr | French Republic | An astronomical calendar introduced after the French Revolution. |
| Hebrew | ||
| h | Hebrew | Hebrew Arithmetical calendar. |
| Islamic | ||
| i | Islamic Tabular | Islamic tabular calendar. |
| ims | Islamic Microsoft Hijri | Islamic Microsoft Hijri calendar. |
| if | Islamic Fātimid | Islamic Fātimid calendar. |
| Chinese | ||
| c | Chinese | The lunisolar Chinese calendar. |
