British Columbia is joining the rest of the Commonwealth to mark the occasion as Queen Elizabeth II becomes Britain's longest-reigning monarch this week.

Her Majesty surpasses the record of her great-great-grandmother Queen Victoria on Wednesday, Sept. 9, making her the longest-reigning female monarch in history. Born Elizabeth Alexandra Mary on April 21, 1926, Elizabeth II became head of the Commonwealth on Feb. 6, 1952 and is serving as Queen for her 63rd year.

Lieutenant Governor Judith Guichon, the Queen's representative in B.C., is hosting a at Government House in Victoria on Saturday, Sept. 12 to celebrate the milestone. The free event is open to everyone and includes music, tea service and children's entertainment.

"In the spirit of the occasion, guests are encouraged to wear their hats and gloves," says the notice from Government House.