The Bureau of the Census has compiled an interesting assortment of facts and figures relating to mothers, compiled from a variety of government information resources. Check them out at http://www.census.gov/newsroom/releases/archives/facts_for_features_special_editions/cb12-ff08.html
Unfortunately, there’s nothing on that page that page that mentions Mothers Day’s disarmament and anti-war roots. Here’s a blurb mentioning that http://en.wikipedia.org/wiki/Mothers_day#United_States