Some form of Mother's Day celebration is observed in just about every country and culture around the globe, at different times throughout the year.
The United States celebrates Mother's Day on the second Sunday in May.
In the 1880's and 1890s, there were several attempts to establish a nationally observed Mother's Day, but they didn't succeed beyond the local level.
The holiday was ultimately created by Anna Jarvis of Grafton, West Virginia, in 1908 as a day to honor mothers. Jarvis wanted to accomplish her mother's dream of making a celebration for all mothers, although the idea didn't really take off until she enlisted the services of wealthy Philadelphia merchant John Wanamaker. She kept promoting the holiday until President Woodrow Wilson made it an official national holiday in 1914.
It eventually became so highly commercialized that many, including its founder Anna Jarvis, considered its original purpose superseded. Jarvis ended up opposing the holiday she had helped to create. She died in 1948, regretting what had become of her holiday.
In the US, Mother's Day remains one of the biggest days for sales of flowers, greeting cards and the like; it is also the biggest holiday for long-distance telephone calls.
Mexico, primarily celebrated in the state of Puebla, and not Mexico's Independence Day (which is September 16). 
