What I didn't know, I share my birthday with:

January 17 --Author Compton Mackenzie (Whisky Galore etc) born. (1883)

What I did know, I share my Wedding Anniversary with:

January 25 --Robert Burns, Scotland’s National Bard, born Alloway. (1759) Traditional night of Burns Supper.

I work with many Scots but am always amazed at how many do not know when Burns Night is (and I'm English!).