i heard it was october 3

i heard march 19

Never heard of it, whatever next ! As if people are going to wait for a day like that to make a statement on their sexuality.

National Denim Day [jean matertial] is on the tenth of March. Or at least memos went around at school that it was March 10th. Whatever the case, that's what I heard.

Sorry to burst your bubble, but I don't really think there is a "National Seal Day". Maybe if you've heard of it, or if you are POSITIVE it's true, ask Wiki if "National Seal Day" is true. I've tried making the best possible answer to come up with, so thanks again for your curiousity. :) Hope this Helped.