International Worker's Day
Elsewhere on timeanddate.com
Mothers' Day
Mother’s Day celebrates the achievements and efforts of mothers and mother figures.
Buddha Purnima/Vesak
Vesak, also known as Buddha Purnima, celebrates of Gautama Buddha's birth, enlightenment and death.
AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?