A、On April 21. B、On June 11. C、On July 12. D、On February 2. B新闻中提到，英国女王每年庆祝两次生日：一次是她真正的生日，在4月21日；一次是官方生日，在6月的某个周六——今年是6月11日。

Tickets for a street party to mark the Queen’s 90th birthday in The Mall will cost ￡150, her grandson has announced. Peter Phillips said the Patron’s Lunch on June 12 was a not-for-profit event and would have a “carnival atmosphere.” Most of the 10 000 guests will be from organizations of which the Queen is patron. The majority of tickets for the event will be made available to the more than 600 charities and organizations associated with the Queen. In February a ballot will open to the public for a minimum of 1 000 tickets, with winners able to buy them from the event’s website. The Queen celebrates two birthdays each year: her actual birthday on April 21 and her official birthday on a Saturday in June— this year on June 11. Other events taking place over the Queen’s official birthday weekend will include a service of thanksgiving at St Paul’s Cathedral and the traditional Trooping the Colour ceremony.
1. What can we learn about the Patron’s Lunch from the news report?
2. When is the Queen’s 90th official birthday this year?