Tripuri calendar
The Tripuri calendar is the traditional solar calendar used by the  Tripuri people, especially in the context of Tripuri irredentism. Its era, the "Twipra Era", "Tripura Era" or Tripurabda is set at 15 April AD 590. The  Tripura Era's New Year is on the 1st of Vaishak which corresponds to 14 or 15 of April of Common Era, depending on whether that year is a Leap year or not. The months are named  in pan Indian months, time since its inception 1419 years back by Tripur king Hamtorfa alias Himtifa alias Jujharufa in 512 Saka Era. Historically, the Tripura Era was prevalent in all official matters of the princely state of Tippera under the British Raj.