When Does The 2025 Nfl Season Start &Amp; End. The preseason will begin thursday, aug. The 2025 nfl season will start with the defending champion kansas city chiefs at home on thursday, september 5.
Go inside the nfl’s 2025 season with the 2025 nfl record and fact book. The first day of the 2025 league year will end at 11:59:59 p.m., new york.