Google marked May 8, 2011 with a Doodle Logo as many of children say thank you to their Mom, Mother, Ma, Mommy or Mama.
Mother’s Day is a celebration of motherhood, paternal bonds, and the influence of the mother in the society. It is always celebrated most commonly in March, April, or May.
Read more about Mother’s Day at Wikipedia.org (http://en.wikipedia.org/wiki/Mother’s_Day)