June 4: Aesop's Birthday.
June 11: TerribleAspect's birthday!
June 16: Bloomsday.
June 19: Juneteenth.
June 21: The first day of summer (northern hemisphere) and winter (southern hemisphere), and Father's day.
June 23: Happy birthday AdamTheDewott!
June 26: Marriage Equality Day in the US.
June 28: Tau Day.
If you have an item for this calendar, /msg Tem42.