2025 Summer Calendar Dates Australia Map. 2025 holidays in australia office holidays provides calendars with dates and information on public holidays and bank holidays in key countries around the world. The following is a list of fun runs, marathons, obstacle course races, triathlons and multisport/adventure races in australia.

Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis. Academic year calendar 2025 extended version.