The Prophet Muhammad's Birthday
Mawlid, or Milad, marks the birth of the Islamic prophet Muhammed, or Mohamed, in the year 570 of the Gregorian calendar.
Elsewhere on timeanddate.com
Labour Day/May Day
Labor Day, International Workers' Day, and May Day, is a day off for workers in many countries around the world.
AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?
Daylight Saving Time (DST)
Why do many countries set the clocks back and forth an hour twice a year?