In the east Asian lunisolar calendars, Dashu (大暑) is a solar term begins when the Sun lies between the celestial longitude of 120° and 135°. It sometimes refers in particular to the day when the Sun is exactly at the celestial longitude of 120°. A lunisolar calendar is a calendar whose date indicates both the moon phase and the time of the solar year. ... A Solar term is one of 24 days in the traditional East Asian lunisolar calendars that match a particular astronomical events or signify some natural phenomenon. ... Right ascension (RA; symbol α: Greek letter alpha; celestial longitude) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ...

Introduction

Dashu usually begins around July 23, and ends around August 7. July 23 is the 204th day (205th in leap years) of the year in the Gregorian Calendar, with 161 days remaining. ... August 7 is the 219th day of the year in the Gregorian Calendar (220th in leap years), with 146 days remaining. ...