Prince Philip, Queen Elizabeth II's husband, to mark 90th birthday

Prince Philip, Duke of Edinburgh, looks at the assembled choir following the annual Commonwealth Day Observance Service on March 14, 2011, in London.

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(CBS/AP) LONDON - The British royal family will celebrate Prince Philip's 90th birthday on June 12, two days after his actual birthday, Buckingham Palace said Tuesday.

The family will mark Queen Elizabeth II's husband's milestone with a service at Windsor Castle's chapel and a reception.

Pictures: Prince Philip

The occasion comes at a busy time for the 84-year-old monarch. On April 29, she will celebrate the wedding of her grandson Prince William and Kate Middleton, and granddaughter Zara Phillips, the daughter of Princess Anne, is getting married in July.

Special section: Britain's royal wedding

The palace created a website where well-wishers can peruse photos and leave Prince Philip a birthday message.

On his actual birthday on June 10, he will perform official duties at Buckingham Palace.

Last year, the palace said that Philip, also known as the Duke of Edinburgh, will step down as president or patron of more than a dozen organizations after he turns 90. According to the report, he will still be associated with more than 800 organizations, despite reducing his commitments.