In an article for Baseball America, J.J. Cooper reports that there are big changes coming to the two complex leagues for the 2024 season. (Baseball America sub. req.) Specifically, the league that traditionally started after the major league draft in June will start much earlier and finish up around the time of the draft in July.
As the article notes, last year the Arizona Complex League and the Florida Complex League started on June 5 and ran until August 22. This year, the league will start on May 4 and will finish on July 25.