There are several Tibetan calendars. These functions implement the official Phuglugs version of the Kalachakra calendar, which is similar to the Hindu lunisolar calendars.
Examples
gregorian_date(2025,6,1:10) |> as_tibetan()
#> <tibetan[10]>
#> [1] 2152-snron-6 2152-snron-7 2152-snron-8 2152-snron-9 2152-snron-10
#> [6] 2152-snron-11 2152-snron-12 2152-snron-12* 2152-snron-13 2152-snron-14