116:(one of the twelve solar terms that are used to determine the months of the year), and is inserted accordingly. Solstice and equinox consistently fall within the second, fifth, eighth and eleventh months. Observations from
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The Tenpō calendar's assume of fixed month either two or three full lunar months will always occur between such months, containing
Solstice and equinoxes. When there are three, that there will be one month without a
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to be designated as the leap month. It does not clearly define how to treat the case where there is only one full interceding lunar month, nor when such a period contains more than one month not containing any
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Unlike previous calendars with uniform hours lengths, the Tenpō calendars hour vary seasonally, posing the length of hours changed depending on the time of year. This made it extremely challenging to make
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149:. In 2033, for the first time in the calendar's history, there will be only one complete lunar month between the autumnal equinox and winter solstice, and two
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when necessary- specifically when three lunar months occurs between those including a solstice/equinox. the leap month lacks any
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153:-less months between the winter solstice and 2034 spring equinox. This situation leads to what is called the
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85:. Marking the final traditional calendar system devised by Japanese astronomers and mathematicians.
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dictates the time used for determining solar terms and lunar phases.
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105:. It begins each lunar month on the day of the new moon and adds A
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Highlighting the
History of Astronomy in the Asia-Pacific Region,
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era (1830–1844) it remained in use throughout the late
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by solar longitude instead of time, unlike the previous
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The Tenpō calendar is no longer officially maintained.
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The Tenpō calendar is a lunisolar system which adopted
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The
Lunisolar Calendar: A Sociology of Japanese Time
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443:History of science and technology in Japan
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42:Tenpō sexagenary unitary calendar
247:"暦Wiki/太陰太陽暦/定気法の影響 - 国立天文台暦計算室"
261:"暦Wiki/時刻/日本の本初子午線 - 国立天文台暦計算室"
1:
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16:Japanese lunisolar calendar
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126:Japanese mechanical clocks
52:. It was published in the
40:, officially known as the
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26:
203:Nussbaum, Louis-Frédéric
74:system was developed by
295:"The Japanese Calendar"
273:Jessica Kennett Cork.
291:National Diet Library
62:, from 1844 to 1872.
46:Tenpō jin'in genreki
438:Specific calendars
414:Gregorian calendar
211:Japan Encyclopedia
76:Shibukawa Kagesuke
50:lunisolar calendar
48:), was a Japanese
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331:Japanese calendar
225:Orchiston, Wayne
174:Japanese calendar
155:Year 2033 Problem
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390:Hōryaku calendar
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179:Sexagenary cycle
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406:Tenpō calendar
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382:Jōkyō calendar
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358:Taien calendar
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342:Genka calendar
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285:External links
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135:Known problems
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21:Tenpō calendar
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448:Time in Japan
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366:Goki calendar
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158: [
99:solar terms
97:, dividing
79: [
432:Categories
207:"Calendar"
205:. (2005).
190:References
107:leap month
72:Tenpō-reki
60:Edo period
33:Tenpō-reki
409:1844–1872
401:1798–1844
393:1755–1798
385:1685–1755
377:862–1685
229:(2011).
213:, p. 98.
168:See also
89:Overview
44:(天保壬寅元暦
369:858–861
361:764–862
353:697–763
345:692–696
66:History
234:p. 155
227:et al.
184:Tenpō
162:]
151:chūki
147:chūki
142:chūki
118:Kyoto
112:chūki
83:]
55:Tenpō
70:The
19:The
209:in
27:天保暦
434::
293:,
218:^
164:.
160:ja
128:.
114:中気
81:ja
30:,
323:e
316:t
309:v
277:.
263:.
249:.
236:.
37:)
24:(
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