The term comes from Hallmark, the giant American greeting card company.
- Saint Valentine's Day (commonly called simply Valentine's Day, by both atheist groups as well as Protestants who do not recognize the Catholic/Orthodox practice of sainthood) was founded in honor of Saint Valentine
- Mother's Day was actually founded by Anna Marie Jarvis
- Father's Day was founded by Sonora Smart Dodd.
Examples of holidays that are more conceivable as Hallmark holidays include Grandparents' Day, Sweetest Day, Boss's Day, Secretary's Day, and Teacher's Day, among others. Grandparents' Day and Sweetest Day (mostly celebrated in the Midwestern and northeastern United States), can be seen as somewhat redundant as Saint Valentine's Day, Mother's Day, and Father's Day already exist. Not all Hallmark holidays have to do with cards, though. Dr. Seuss Day, Earth Day, and the 100th Day of School can also be seen as such. A lot of liberals celebrate Earth Day, but little do they know, it is pretty much a holiday that exists in name only. There have been Earth Day celebrations (as well as Woodstock festivals and Democratic presidential campaign areas) that have been left a mess as a result. It is also an example of liberal hypocrisy as Earth Day has just as much negative affects on the environment as other overly commercialized holidays that they criticize.