We don't believe in coincidences. So were skeptical until we verified that the International Day in Support of Victims of Torture is a designated United Nations microminiholidayette and that the linked website confirms that the U.N. absolutely does not have stay-at-home moms in mind.
But Usual Suspect American Greetings does say that Wednesday will be Stay-at-home Moms Day. But these two micominiholidayettes are not different sides of the same coin.
The U.N. has a second observance set for June 26, as well: The theme for this year's United Nations International Day Against Drug Abuse and Illicit Trafficking is "Make health your 'new high' in life, not drugs."
Wikipedia, Christmas did not become a federal holiday in the United States until June 26, 1870 (and then only for federal employees in the District of Columbia -- Christmas not become a holiday for all federal workers until 1968).