Ismaili date co star

You're referring to the Ismaili calendar!

The Ismaili calendar is a lunisolar calendar used by the Ismaili Muslims, a branch of Shia Islam. It is based on the Islamic calendar, but with some additional months to account for the solar year.

Here's a brief overview of the Ismaili calendar:

• The Ismaili calendar has 354 or 355 days, depending on the lunar cycle.
• It has 12 months, with the following names:
  1. Jamadi al-Awwal (30 days)
  2. Jamadi al-Thani (30 days)
  3. Rajab (30 days)
  4. Sha'ban (29 or 30 days)
  5. Ramadan (29 or 30 days)
  6. Shawwal (30 days)
  7. Dhu al-Qadah (30 days)
  8. Dhu al-Hijjah (30 days)
  9. Muharram (30 days)
  10. Safar (29 or 30 days)
  11. Rabi' al-Awwal (30 days)
  12. Rabi' al-Thani (30 days)
• The Ismaili calendar is used to determine important dates and events in the Ismaili calendar, such as the birth and death anniversaries of the Imams, as well as the dates of important Ismaili festivals and celebrations.

I hope that helps!