According to the news item, how long does the queen’s vacation in Edinburgh usually last?

Queen Elizabeth Ⅱ tins canceled her annual vacation in the Scottish capital Edinburgh because of plans for anti-poverty rallies there to coincide with a summit of the world’s richest nations, Buckingham Palace said Saturday.
   The palace said the queen would not spend her usual week at Holyroodhouse in Edinburgh in early July because of the planned marches, which are expected to attract thousands of proteins.
   Her annual garden party at the city’s Holyrood Palace has been postponed until July 28.
   The anti-poverty campaigner Bob Gcldof has called for a million protesters to converge in Edinburgh during the July 6-8 summit of the G8 nations at nearby Gleneagles.
   The queen’s stay at Holyroodhouse is part of the extended summer vacation she takes every year. Much of the time is spent at her Scottish country seat, Balmoral Castle; the palace said she will head there as usual after the delayed garden party.
   The Edinburgh march will come after a series of international concerts aimed at drawing attention to poverty in Africa.
   G8 summits in recent years have attracted sometimes violent protests by activists, many of them opposed to globalization. At the 2001 summit in Genoa, Italy, demonstrators threw stones and homemade firebombs at riot police, who responded with water cannons and tear gas. Police also shot dead one activist.