Since there have been some links posted of old advertisements and commercials, I decided I'd post a place. I've visited this place many times and it's full of all the old cartoons of the 60's-90's.
You can find anything from C-3PO's Cereal (Cherios with C-3PO on the cover) to the fool pitying Mr. T.
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 | Ash Wednesday 46 days before Easter Sunday (February or March) |
 | Easter Between March 22nd to April 25th |
 | Greek Independence Day March 25th |
 | March Madness March through first week of April |
 | Mardi Gras / Shrove Tuesday / Carnaval / Carnival Tuesday before Ash Wednesday (February or March) |
| | Palm Sunday Sunday before Easter |
 | St. Patrick's Day March 17th |
| More holidays | |