For one day every year, most Christians (specifically Catholics and Lutherans, with a few other denominations) all over the world don an ash cross on their foreheads. Why?
In a nutshell, Ash Wednesday is the first day of Lent, which happens 46 days before Easter (40 days, excluding Sundays) Ash Wednesday can happen as early as February 4th, and as late as March 10th.
Ashes are placed on the forehead of Christians as a reminder and celebration of human mortality, and as a sign of mourning and repentance to God...