St Patrick's Day

Hey everyone,
Today is my first entry in English in my notebook. It' [It's, but I think this was just a typo] also the first day of the rest of my life, but this is another story.
I was talking an hour ago with my conversation partner, Kevin from Canada, and I realized that I didn't know what Saint Patrick's Day [Day is capatalized because it's part of the whole proper noun, Saint Patrick's Day] was about. What's the matter with me?
So I googled it and opened the first answer: Wikipedia (in English of course :p ). Saint Patrick's Day is a cultural and christian celebration in Ireland. Ok, everyone knows it [that, instead of 'it' sounds better].
In fact, it commemorates St. Patrick and the arrival of Christianity in Ireland, and [it, clarify your subject] celebrates Irish's culture and heritage.
But on [the] wikipedia page, you can see that many countries celebrate this day (Japan, Switzerland,... and even [the] International Space Station!). I think for them it's just another way to get drunk and put [on, 'to put on' is the verb for wearing clothing] a green t-shirt they never wear the rest of the year!
Anyway, happy Saint Patrick Day to all Irish people on Italki (and beyond :p ).

Well written! Also, at least in the States, St. Patrick's Day got really big after we had a lot of Irish immigrants after the Great Potato Famine, and all the displaced Irish wanted to celebrate their heritage. Either way, Happy St. Patrick's Day to you too!