* asia: Add a comment on timekeeping in Japan from the 7th to the 19th century. --- asia | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/asia b/asia index 590c05b..11a1726 100644 --- a/asia +++ b/asia @@ -1828,6 +1828,16 @@ Zone Asia/Jerusalem 2:20:54 - LMT 1880 # '9:00' and 'JST' is from Guy Harris. +# From Paul Eggert (2020-01-19): +# Starting in the 7th century, Japan generally followed an ancient Chinese +# timekeeping system that divided night and day into six hours each, +# with hour length depending on season. In 1873 the government +# started requiring the use of a Western style 24-hour clock. See: +# Yulia Frumer, "Making Time: Astronomical Time Measurement in Tokugawa Japan" +# <https://www.worldcat.org/oclc/1043907065>. As the tzdb code and +# data support only 24-hour clocks, its tables model timestamps before +# 1873 using Western-style local mean time. + # From Hideyuki Suzuki (1998-11-09): # 'Tokyo' usually stands for the former location of Tokyo Astronomical # Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N. -- 2.24.1