Season 3 will continue that trend very soon. Season 3 will drop Wednesday, April 12 at 10 am Pdt/1 pm Est. Unfortunately, according to an Activision blog post, Season 3 and the update will launch simultaneously, so players won't get to pre-load the patch.
Modern Warfare 2 and Warzone 2.0 season 4 launches on Wednesday, July 14, 2024 at the same time in all regions around the world. Here's when it will release in your time zone: 9 a.m. PDT for the west coast of North America. 12 p.m. EDT for the east coast of North America.