![A churchyard at night lit up by burning candles on the graves.](http://c.tadst.com/gfx/300x168/istock-1205713173.jpg)
All Saints' Day
Many churches honor all their saints on All Saints' Day, also known as All Hallows' Day.
Many churches honor all their saints on All Saints' Day, also known as All Hallows' Day.
Muharram is the first month of the Islamic calendar and a time of remembrance or mourning.
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?
Why do many countries set the clocks back and forth an hour twice a year?