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User:DennouNeko/Time test

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Disclaimer: This is experimental, purely speculational work. It should serve at most for approximation of dates.

It uses Module:Timeconv for conversions between Gregorian date and Julian day, or between Julian day and Gensokyo's Lunisolar calendar.

Assumptions:

  • The calendar is based on old Japanese lunisolar calendar (that was based on old Chinese lunisolar calendar).
  • Margin of error of dates specified at Gensokyo Timeline is no more than +/- 2 days
  • Last month in season contains the spring equinox (in Chinese calendar it contained winter solstice) and the season starts with uzuki month, numbered as 1.
  • There may be a leap month at (almost) any point of the year, it is marked with negative number of preceding month.

Conversion verification

Original Julian date Converted
118/4/15 2452863.5 118/4/15 (Tuesday)
118/11/29 2453083.5 118/11/29 (Friday)
118/-11/29 2453113.5 118/18446744073709551605/29 (Sunday)
118/12/29 2453142.5 118/12/29 (Monday)
119/1/1 2453144.5 119/1/1 (Wednesday)
119/5/14 2453275.5 119/5/14 (Monday)
119/6/15 2453306.5 119/6/15 (Thursday)

Time difference tests

Gregorian Gensokyo delta JD corrected Gensokyo
2003.08.12 118/4/15 0 118/4/15 (Tuesday)
delta 270 270
2004.05.08 118/12/20 0 118/12/20 (Saturday)
delta 10 11
2004.05.18 119/1/1 -1 118/12/30 (Tuesday)
delta 132 131
2004.09.27 119/5/14 0 119/5/14 (Monday)
delta 32 31
2004.10.29 119/6/15 1 119/6/16 (Friday)

Leap season test

113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
yes no no yes no yes no no yes no no yes no yes no no yes no no

Month sequence test

  • 113, season of star, summer and wood
month: 1 2 -2 3 4 5 6 7 8 9 10 11 12
days: 30 29 29 30 30 29 30 30 30 29 30 29 29
  • 114, season of sun, autumn and metal
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 29 30 29 30 30 30 29 30 30 29
  • 115, season of moon, winter and earth
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 29 30 29 29 30 29 30 30 29 30 30 30
  • 116, season of star, spring and fire
month: 1 -1 2 3 4 5 6 7 8 9 10 11 12
days: 29 29 30 29 29 30 29 30 29 30 30 30 29
  • 117, season of sun, summer and water
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 30 29 29 30 29 30 29 30 30 29
  • 118, season of moon, autumn and wood
month: 1 2 3 4 5 6 7 8 9 10 11 -11 12
days: 30 30 29 30 29 29 30 29 30 29 30 29 30
  • 119, season of star, winter and metal
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 30 29 30 29 30 29 30 29 30 29
  • 120, season of sun, spring and earth
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 30 30 29 30 30 29 29 30 29 30
  • 121, season of moon, summer and fire
month: 1 2 3 4 -4 5 6 7 8 9 10 11 12
days: 29 30 29 30 29 30 30 29 30 30 29 29 30
  • 122, season of star, autumn and water
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 29 29 30 29 30 30 30 29 30 30 29 29
  • 123, season of sun, winter and wood
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 29 30 29 30 30 29 30 30 30 29
  • 124, season of moon, spring and metal
month: 1 2 -2 3 4 5 6 7 8 9 10 11 12
days: 29 30 29 29 30 29 30 29 30 30 30 29 30
  • 125, season of star, summer and earth
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 29 30 29 29 30 29 30 29 30 30 29 30
  • 126, season of sun, autumn and fire
month: 1 2 3 4 5 6 7 8 9 10 11 12 -12
days: 30 29 30 29 29 30 29 30 29 30 29 30 30
  • 127, season of moon, winter and water
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 30 29 29 30 29 30 29 30 29 30
  • 128, season of star, spring and wood
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 30 29 30 29 30 29 30 29 30 29 30 29
  • 129, season of sun, summer and metal
month: 1 2 3 4 5 6 -6 7 8 9 10 11 12
days: 30 29 30 29 30 30 29 30 29 30 29 30 29
  • 130, season of moon, autumn and earth
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 29 30 30 29 30 30 29 30 29 30 29 30
  • 131, season of star, winter and fire
month: 1 2 3 4 5 6 7 8 9 10 11 12
days: 29 29 30 29 30 30 29 30 30 30 29 29
  • 132, season of sun, spring and water
month: 1 2 -2 3 4 5 6 7 8 9 10 11 12
days: 30 29 29 30 29 30 29 30 30 30 29 30 29

Season 0 and current date

Calculations for: 2024.03.29 00:00 (GMT)

Current Gregorian date: 2024.03.29 (Friday))
Current Gensokyo date: 138/11/20 (Friday)
0/1/1: 1885.05.15 (Friday))