About National Old Maids Day
Observances and National Days are often subject to the passing of time. A few decades ago, maybe there was a telegram day, or crossing the Atlantic in under a week Day, but as society advances, so do holidays.
This is a good example of one. In the middle of the 20th century, Marion Richards saw that Mothers had their special day, but that unmarried, childless women were pretty much ignored. Richard begans the first "Old Maids" Day to recognise their contribution to society. She hoped that the day would take on the same importance as Mother's Day, but it wasn't to be.
This was in part in shifting attitudes to those who decide to live their life without getting married or having children, and are perfectly happy about that without having a special day.