Queen Elizabeth II celebrates her 90th birthday this year. She celebrates two birthdays each year: her actual birthday, on April 21st, and her official birthday, on the second Saturday in June.
Surf the following sites to get more information.
Queen Elizabeth II
https://www.royal.uk/her-majesty-the-queen
The Queen' s birthday
https://www.royal.uk/queens-birthday
The Queen in 90 images. One picture from every year of her life.
http://www.bbc.com/news/in-pictures-36013958
Birthday' s celebrations:
http://www.standard.co.uk/lifestyle/london-life/the-queen-s-90th-how-elizabeth-iis-official-birthday-will-be-celebrated-in-london-a3264811.html
Videos
The Queen at 90
Trooping the Colour 2016
Some information about the UK form of government