Japanese Almanac2020 Japanese almanac: solar terms, lunisolar months, rokuyō
Sexagenary year庚子
Spring equinoxMar 2012:50 JST
Autumn equinoxSep 2222:31 JST
Leap monthleap M4May 23
The 24 solar terms (JST)
| Term | Longitude | Date | Day | Time |
|---|---|---|---|---|
| Shōkan (Minor cold) | 285° | Jan 6 | Mon | 06:30 |
| Daikan (Major cold) | 300° | Jan 20 | Mon | 23:55 |
| Risshun (Start of spring) | 315° | Feb 4 | Tue | 18:03 |
| Usui (Rain water) | 330° | Feb 19 | Wed | 13:57 |
| Keichitsu (Awakening of insects) | 345° | Mar 5 | Thu | 11:57 |
| Shunbun (Spring equinox) | 0° | Mar 20 | Fri | 12:50 |
| Seimei (Clear and bright) | 15° | Apr 4 | Sat | 16:38 |
| Kokuu (Grain rain) | 30° | Apr 19 | Sun | 23:45 |
| Rikka (Start of summer) | 45° | May 5 | Tue | 09:51 |
| Shōman (Grain buds) | 60° | May 20 | Wed | 22:49 |
| Bōshu (Grain in ear) | 75° | Jun 5 | Fri | 13:58 |
| Geshi (Summer solstice) | 90° | Jun 21 | Sun | 06:44 |
| Shōsho (Minor heat) | 105° | Jul 7 | Tue | 00:14 |
| Taisho (Major heat) | 120° | Jul 22 | Wed | 17:37 |
| Risshū (Start of autumn) | 135° | Aug 7 | Fri | 10:06 |
| Shosho (End of heat) | 150° | Aug 23 | Sun | 00:45 |
| Hakuro (White dew) | 165° | Sep 7 | Mon | 13:08 |
| Shūbun (Autumn equinox) | 180° | Sep 22 | Tue | 22:31 |
| Kanro (Cold dew) | 195° | Oct 8 | Thu | 04:55 |
| Sōkō (Frost’s descent) | 210° | Oct 23 | Fri | 08:00 |
| Rittō (Start of winter) | 225° | Nov 7 | Sat | 08:14 |
| Shōsetsu (Minor snow) | 240° | Nov 22 | Sun | 05:40 |
| Taisetsu (Major snow) | 255° | Dec 7 | Mon | 01:10 |
| Tōji (Winter solstice) | 270° | Dec 21 | Mon | 19:02 |
Start of each lunisolar month (new moon day)
| Month | Starts | Days |
|---|---|---|
| 1 | Jan 25 (Sat) | 30 |
| 2 | Feb 24 (Mon) | 29 |
| 3 | Mar 24 (Tue) | 30 |
| 4 | Apr 23 (Thu) | 30 |
| leap 4 | May 23 (Sat) | 29 |
| 5 | Jun 21 (Sun) | 30 |
| 6 | Jul 21 (Tue) | 29 |
| 7 | Aug 19 (Wed) | 29 |
| 8 | Sep 17 (Thu) | 30 |
| 9 | Oct 17 (Sat) | 29 |
| 10 | Nov 15 (Sun) | 30 |
| 11 | Dec 15 (Tue) | 29 |
Seasonal days
| Name | Date | Time |
|---|---|---|
| Winter doyō begins | Jan 18 | 01:12 |
| Spring doyō begins | Apr 16 | 22:06 |
| 88th night | May 1 | – |
| Nyūbai (rainy-season start) | Jun 10 | 19:28 |
| Hangeshō | Jul 1 | 18:20 |
| Summer doyō begins | Jul 19 | 14:13 |
| 210th day | Aug 31 | – |
| 220th day | Sep 10 | – |
| Autumn doyō begins | Oct 20 | 07:38 |
Days of each rokuyō
61
61
61
61
61
61
Spring equinox date, 1951–2050
45
55
Computed from the JPL DE421 ephemeris with Skyfield, in Japan Standard Time. The lunisolar dates follow the traditional Tenpō rules for reference only (the leap month around 2033 is disputed). Rokuyō and the sexagenary cycle are calendar customs, not predictions.
About this page
In 2020 the spring equinox falls on Mar 20 and the autumn equinox on Sep 22; 12 lunisolar months begin, including leap month 4.