Date and Time (UTC)
| year | begin | end |
| 辛巳 |
2001-05-05 10:44 |
2001-05-20 23:44 |
| 壬午 |
2002-05-05 16:37 |
2002-05-21 05:29 |
| 癸未 |
2003-05-05 22:10 |
2003-05-21 11:12 |
| 甲申 |
2004-05-05 04:02 |
2004-05-20 16:59 |
| 乙酉 |
2005-05-05 09:52 |
2005-05-20 22:47 |
| 丙戌 |
2006-05-05 15:30 |
2006-05-21 04:31 |
| 丁亥 |
2007-05-05 21:20 |
2007-05-21 10:11 |
| 戊子 |
2008-05-05 03:03 |
2008-05-20 16:00 |
| 己丑 |
2009-05-05 08:50 |
2009-05-20 21:51 |
| 庚寅 |
2010-05-05 14:44 |
2010-05-21 03:33 |
| 辛卯 |
2011-05-05 20:23 |
2011-05-21 09:21 |
| 壬辰 |
2012-05-05 02:19 |
2012-05-20 15:15 |
| 癸巳 |
2013-05-05 08:18 |
2013-05-20 21:09 |
| 甲午 |
2014-05-05 13:59 |
2014-05-21 02:59 |
Source: JPL Horizons On-Line Ephemeris System
Lìxià, Rikka, Ipha, or Lập hạ is the 7th solar term according to the traditional East Asian calendars, which divide a year into 24 solar terms (節氣). It signifies the beginning of summer in East Asian cultures.
It begins when the Sun reaches the celestial longitude of 45° and ends when it reaches the longitude of 60°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 45°. In the Gregorian calendar, it usually begins around May 5 and ends around May 21.