The first day of the fifth lunar month is the date of the solar calendar.

June 18. On the first day of the fifth lunar month in 2023, the solar calendar is June 18, and the lunar calendar is the current traditional calendar in China. It belongs to the combined calendar of yin and yang, that is, the lunar calendar and the solar calendar. According to the change cycle of the moon phase, each moon phase changes to one month, taking the tropic year of the sun as the length of a year, and adding 24 solar terms to set up leap months, so that the average calendar year can adapt to the tropic year.