Here is some history on the Victoria Day holiday: It is a federal Canadian public holiday celebrated on the last Monday before May 25, in honour of Queen Victoria‘s birthday. It is sometimes informally considered as marking the beginning of the summer season in Canada.
The holiday has been observed in Canada since at least 1845, originally falling on the sovereign’s actual birthday, and continues to be celebrated in various fashions across the country on the fixed date; the holiday has always been a distinctly Canadian observance. It is a federal statutory holiday, as well as being a holiday in six of Canada’s ten provinces and all three of its territories. In Quebec, the same day was unofficially known as Fête de Dollard from the Quiet Revolution until 2003, when provincial legislation officially created National Patriots’ Day on the same date as Victoria Day. (Wikipedia)