Hallmark holiday

In the United States, a Hallmark holiday is a holiday that is perceived to exist primarily for commercial purposes, rather than to commemorate a traditionally or historically significant event.

Background
The name comes from Hallmark Cards, a privately owned American company, that benefits from such manufactured events through sales of greeting cards and other items.

Holidays that have been referred to as "Hallmark holidays"

 * Boss's Day
 * Clergy Appreciation Day
 * Mother's Day
 * Father's Day
 * Friendship Day
 * Grandparents Day
 * Groundhog Day
 * National Doctors' Day
 * National Nurses' Day
 * Sisters' Day
 * Sweetest Day