The 2020-21 A-League and W-League seasons will kick off on Sunday, December 27.
There will be 161 A-League matches played over 23 weeks, with the grand final set for June.
It will also be newcomers Macarthur FC's first season in the competition, with the league expanding to 12 teams.
"This year's calendar sees us kicking off two seasons of Australia's best football on the same day, right in the middle of summer," A-League boss Greg O'Rourke said.
"The men's competition now features 12 teams, including three in Sydney and three in Melbourne, meaning more derbies, more intensity and more fans."
The nine-team W-League will complete a 57-game season, with the grand final due to be held in April.
The W-League is arguably facing its most challenging season after the majority of the Matildas departed the competition to base themselves at Europe's top clubs.