Mother's Day in 2015 was celebrated on Sunday, May 10th and is scheduled to fall on May 8th in 2016. Mother's Day is a celebration that falls on the second Sunday of May, meaning it potentially occurs as early as May 8 or as late as May 14.
Mother's Day became an official holiday in the United States in the early 1900s, largely due to the work of Anna Jarvis. In 1914, President Woodrow Wilson signed a document setting aside the second Sunday in May as Mother's Day. The day is frequently celebrated with cards, flowers and gifts in addition to family gatherings. According to History.com, there are more telephone calls on this day than on any other day each year.