仪天历 Northern Song · Shi Xu

Overview

Promulgated in 1001 CE under Shi Xu and used for over twenty years.

Key data

Item	Detail
Period of use	1001 – 1023 CE
Compiler	Shi Xu
Year head	Jian-yin

Development

The Yitian calendar was made by Shi Xu, promulgated in 1001 CE, replacing the Qianyuan and used until 1023.

Most Northern Song calendrists worked within the old methods with minor adjustments; so with this one.

Calendar and prognostication

Song calendrists often also held posts in prognostication, and the two ran side by side. Yet the calendar seeks the regular course of the heavens, while prognostication asks after anomalies — different matters, to be kept apart.

Full text

No electronic full text of this work is available here. This calendar has no separate transmitted text; its methods survive scattered in the calendrical treatises of the standard histories. Among the histories held here, see Songshi, Calendrical Treatise, juan 69.
The title, date, summary and index structure compiled here are offered under CC BY 4.0 (attribution: Chujia Kuang · kuangchujia.com).

Compiled and arranged by Chujia Kuang.

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