---
title: "Tibetan Calendar (Phugpa) (藏曆)"
method: GET
path: "/api/trpc/tibetan.calendar"
tags: ["Tibetan"]
---

# Tibetan Calendar (Phugpa) (藏曆)

`GET /api/trpc/tibetan.calendar`

## Request

- Base URL: `https://api.asktian.com`
- URL: `https://api.asktian.com/api/trpc/tibetan.calendar`
- Auth: HTTP bearer

Losar, leap months and the calendar's genuine skipped and repeated days, computed exactly per Janson's formalization of the Phugpa arithmetic — three Losar anchors and five published duchen dates reproduced, the 65-year leap cycle proven as a theorem, the Tsurphu and Bhutanese variants named out of scope.

Cost: 2 TIAN Points per call. tRPC procedure `tibetan.calendar`.

## 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).

---

[API](https://skmtc.dev/asktian/apis/asktian-metaphysics-api.md) · [All operations](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/llms.txt) · [OpenAPI document](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/revisions/3c8fdc979206?raw)