Children's day!

Hello!

Today is a special day here in Brazil. It's a hollyday called "children's day".
I just did some research on google and discovered that this day is celebrated around the world in on different dates, despite November 20 being officialy stated by United Nations recommendations the "Universal children's day".
I'm not a child anymore, but I'm happy as a child for not having to work and study today :D

Thanks for reading, any feedback would be appreciated.

The underlined phrase is correct for spoken American English (and probably not a problem for written American English) but I believe, technically, it should be "I've just done some research..." but this is a topic of discussion between British English and American English.  Being American I prefer "I just did some research..." in speech and probably "I've just done some research..." in more formal writing.