Gu Yanwu顧炎武
A scholar who traced the history of the twelve double hours.
- Era
- Late Ming to early Qing · 1613–1682
- Known for
- Ri Zhi Lu
一日分為十二，始見於此。
Ri Zhi Lu, vol. 20
What it is
Gu Yanwu is known for careful textual study. His Ri Zhi Lu shows that the Zuo Zhuan speaks of ten times of day, and that Du Yu’s commentary first divides the day into twelve.
On this site
Our names for the double hours follow his study.
Sources Siku Quanshu Zongmu Tiyao; Han Yu; Xie Ji Bian Fang Shu.