March to November.

What he said but the season is also on a pause while the Leagues Cup is taking place between MLS and Liga MX

If you want to really nerd out on the details of how the season’s schedule is setup this year (it’s quite different than most leagues), check out this article: mlssoccer.com/…/2023-mls-regular-season-schedule-…

Pertinent details start at the section titled “Leagues Cup Break”. Most importantly, the section titled “MLS Schedule Construction” outlines how the teams are group and how often they play each other. It’s a little convoluted.

Speaking of convoluted, here’s the playoff rules this season: mlssoccer.com/…/mls-announces-new-playoff-format-…