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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 | California Strawberry Festival Middle of May |
 | Cinco de Mayo (Mexico) May 5th |
 | May Day May 1st |
 | Memorial Day (USA) Last Monday in May |
 | Mother's Day Second Sunday of May |
 | Victoria Day (Canada) May 24th (25th if 24th falls on a Sunday) |
| More holidays | |