Their first day in London was one of introductions, bilateral meetings, a reception at the royal palace with Queen Elizabeth and dinner at Number 10 Downing Street, the official residence of British prime ministers.
VOA: standard.2009.04.01
If the child does turn out to be a girl, she is destined to ascend the throne as queen one day.
Two of those days listed are regarding the 'Day of Opening of a Session of the Houses of Parliament' by the Queen and the 'Day of the Prorogation of a Session of the Houses of Parliament' also by the Queen.