Japanese AlmanacJapanese calendar for May 2026
Last updated:
| Date | Day | Old calendar | Rokuyō | Day sign | Solar terms and seasonal days |
|---|---|---|---|---|---|
| 5/1/26 | Fri | 3/15 | Taian | 乙亥 | |
| 5/2/26 | Sat | 3/16 | Shakkō | 丙子 | Hachijū-hachiya (88th night) |
| 5/3/26 | Sun | 3/17 | Senshō | 丁丑 | |
| 5/4/26 | Mon | 3/18 | Tomobiki | 戊寅 | |
| 5/5/26 | Tue | 3/19 | Senbu | 己卯 | Rikka (Start of summer) 20:49 |
| 5/6/26 | Wed | 3/20 | Butsumetsu | 庚辰 | |
| 5/7/26 | Thu | 3/21 | Taian | 辛巳 | |
| 5/8/26 | Fri | 3/22 | Shakkō | 壬午 | |
| 5/9/26 | Sat | 3/23 | Senshō | 癸未 | |
| 5/10/26 | Sun | 3/24 | Tomobiki | 甲申 | |
| 5/11/26 | Mon | 3/25 | Senbu | 乙酉 | |
| 5/12/26 | Tue | 3/26 | Butsumetsu | 丙戌 | |
| 5/13/26 | Wed | 3/27 | Taian | 丁亥 | |
| 5/14/26 | Thu | 3/28 | Shakkō | 戊子 | |
| 5/15/26 | Fri | 3/29 | Senshō | 己丑 | |
| 5/16/26 | Sat | 3/30 | Tomobiki | 庚寅 | |
| 5/17/26 | Sun | 4/1 | Butsumetsu | 辛卯 | |
| 5/18/26 | Mon | 4/2 | Taian | 壬辰 | |
| 5/19/26 | Tue | 4/3 | Shakkō | 癸巳 | |
| 5/20/26 | Wed | 4/4 | Senshō | 甲午 | |
| 5/21/26 | Thu | 4/5 | Tomobiki | 乙未 | Shōman (Grain buds) 09:37 |
| 5/22/26 | Fri | 4/6 | Senbu | 丙申 | |
| 5/23/26 | Sat | 4/7 | Butsumetsu | 丁酉 | |
| 5/24/26 | Sun | 4/8 | Taian | 戊戌 | |
| 5/25/26 | Mon | 4/9 | Shakkō | 己亥 | |
| 5/26/26 | Tue | 4/10 | Senshō | 庚子 | |
| 5/27/26 | Wed | 4/11 | Tomobiki | 辛丑 | |
| 5/28/26 | Thu | 4/12 | Senbu | 壬寅 | |
| 5/29/26 | Fri | 4/13 | Butsumetsu | 癸卯 | |
| 5/30/26 | Sat | 4/14 | Taian | 甲辰 | |
| 5/31/26 | Sun | 4/15 | Shakkō | 乙巳 |
Method
Solar terms are the moments the Sun’s apparent ecliptic longitude reaches multiples of 15°, computed with Skyfield and the JPL DE421 ephemeris and given in Japan Standard Time. Old-calendar months begin on the JST date of each new moon; the month containing the winter solstice is month 11, and in a year with 13 months the first month without a principal term is the leap month. Rokuyō follow (month + day) of the old calendar; day signs follow the 60-day cycle. Seasonal days use the conventional definitions (e.g. setsubun = the day before risshun, hachijū-hachiya = the 88th day counting risshun as day 1). Dates were cross-checked against the National Astronomical Observatory of Japan’s published calendar.
About this page
Old calendar, rokuyō and solar terms for each day of May 2026 (Japan time).
Rokuyō are a traditional calendar notation still printed on Japanese calendars. They have no scientific basis; this site lists them only as a calendar convention.