---
title: "Old Style / New Style Dating (新舊曆法轉換)"
method: GET
path: "/api/trpc/oldStyle.convert"
tags: ["Western"]
---

# Old Style / New Style Dating (新舊曆法轉換)

`GET /api/trpc/oldStyle.convert`

## Request

- Base URL: `https://api.asktian.com`
- URL: `https://api.asktian.com/api/trpc/oldStyle.convert`
- Auth: HTTP bearer

OLD STYLE / NEW STYLE DATING and the ENGLISH CALENDAR REFORM OF 1752 — the double-dated world of the English archives: until 1752 England and its colonies kept the JULIAN calendar with the legal year turning on LADY DAY (25 March), so a winter date carried two years at once ('11 February 1731/32') and every English document before the reform must be read through this lens. THE WASHINGTON ANCHOR is the textbook case, a load law: born 11 February 1731 (OS, legal year) = 22 February 1732 (NS) — why the United States celebrates the 22nd. THE REFORM AS LAWS, all derived from the shared Julian machinery: 1751 a SHORT YEAR of exactly 282 days; ELEVEN DAYS VANISHED that September — Wednesday 2 September followed by Thursday 14 September, consecutive real days, weekdays asserted; the 'Give us our eleven days!' riots served as the largely-MYTH they are. Converts BOTH directions with the double-dated form rendered; Scotland's 1600 half-step disclosed; and the same machinery derives why the OCTOBER Revolution is celebrated in NOVEMBER (Julian 25 Oct 1917 = 7 Nov). Western becomes forty-seven. Pure compute, no LLM.

Cost: 1 TIAN Points per call. tRPC procedure `oldStyle.convert`.

## 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)