---
title: "Zoroastrian Roz-o-Mah (瑣羅亞斯德曆)"
method: GET
path: "/api/trpc/zoroastrian.rozOMah"
tags: ["Persian"]
---

# Zoroastrian Roz-o-Mah (瑣羅亞斯德曆)

`GET /api/trpc/zoroastrian.rozOMah`

## Request

- Base URL: `https://api.asktian.com`
- URL: `https://api.asktian.com/api/trpc/zoroastrian.rozOMah`
- Auth: HTTP bearer

Zoroastrian ROZ-O-MAH — the day-yazata reading of the ancient Persian/Avestan calendar, a new Persian tradition. A Gregorian date is converted to the Zoroastrian calendar (12 months of 30 days + 5 Gatha days = 365) and read through the divinity (Yazata) that presides over the day (Roz) and the month (Mah). The 30 Roz run Hormazd, Bahman, Ardibehesht … Mihr (16) … Aneran (30), with the three Creator days at 8/15/23. When the day-yazata equals the month-yazata the day is a NAME-FEAST (Jashan): Tiragan, Mihragan, Abanagan, Adargan, Bahmanagan, Esfandgan and the four Daygan days. Also surfaces the six GAHANBAR seasonal feasts, the MUKTAD across the 5 Gatha days, SADEH, and — with a time — the five GAH watches (with the winter Rapithwin→Second Havan rule). The FASLI variant anchors Nowruz to the vernal equinox (reusing the project Sun ephemeris), locked to the official gold vectors (Nowruz 2024 & 2025 = Mar 20); the Shahanshahi & Kadmi vague-year variants are reported too (Kadmi runs 30 days ahead). Names and domains are from the Sīh-rōzag; per-day auspices are an honest reconstruction from each yazata's domain — Zoroastrian cultural heritage for reflection, not prediction.

Cost: 6 TIAN Points per call. tRPC procedure `zoroastrian.rozOMah`.

## Query parameters

- `input` string

## Response `200`

tRPC result envelope

- TrpcResult: tRPC HTTP response envelope.
  - `result` object
    - `data` object: The procedure's return value (system-specific).

---

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