Mandaean Calendar (曼達安曆)

THE MANDAEAN CALENDAR — the 365-day sacred year of the last surviving Gnostics, the baptizing community of the Tigris–Euphrates marshes, counting its years from the creation of Adam. Twelve 30-day months named for the zodiac (Daula/Aquarius through Gadia/Capricorn) plus the five holy PARWANAYA (Panja) days between Šumbulta and Qaina — the days in which the world of light was created, the year's great baptismal festival, ritually belonging to no month. No leap day, ever: the whole year recedes one Gregorian day every four years, a vague year like the ancient Egyptian. THE ANCHOR LINE TRIANGULATES: Dehwa Rabba 22 Jul 2000 (Mandaean Associations Union), 1 Daula 481,343 AA = 18 Jul 2019 and Dehwa Rabba 16 Jul 2024 (Wikipedia) all fall on ONE 365-day line — three publications a quarter-century apart, zero degrees of freedom — with Dehwa Hanina proven at 18 Taura against both witnesses' dates twenty years apart, and Parwanaya at 13–17 March 2024 & 2025, all asserted at load. Serves any date's Mandaean year/month/day (Panja flagged), the festival cycle — Kansia u-Zahila and the 36-hour seclusion, Dehwa Rabba, the Feast of the Great Shishlam, Dehwa Hanina, the Golden Baptism (single-witness day-number flagged) — and the next festival with countdown. The Mandaean tradition becomes the catalogue's 36th. Pure compute, no LLM.

Cost: 2 TIAN Points per call. tRPC procedure mandaean.date.