Mother's Day

Mother's Day is a celebration honoring mothers and motherhood, maternal bonds, and the influence of mothers in society. 
"Mother's Day" in the United States came from women's peace groups. A common early activity was the meeting of groups of mothers whose sons had fought or died on opposite sides of the American Civil War.
On May 8, 1914, the U.S. Congress passed a law designating the second Sunday in May as Mother's Day and requesting a proclamation.
On May 9, 1914 President Woodrow Wilson issued a proclamation declaring the first national Mother's Day as a day for American citizens to show the flag in honor of those mothers whose sons had died in war. This was adopted by most of the Countries in the World including India.

Courtesy : Wikipedia