June 21 is always the 172nd day of the year, unless it's a leap year in which it is the 173rd day of the year. This is on a Gregorian calendar, which leaves 193 days remaining until January 1st, where a new year beings. June 21 marks the summer solstice in the northern hemisphere and the winter solstice in the southern hemisphere https://www.xn--he5b11d80l.com/