You can pretty much divide DL into 4 seasons:
peak: 6/22-8/26; 2 weeks of Christmas; Easter weekend; Thanksgiving Day/weekend; Labor Day weekend - Fri-Mon
very crowded: President's Day weekend; last workweek of August-September 23rd; week before & after Easter; Superbowl Sunday (my long-ago favorite); Memorial Day weekend; weekend prior to Christmas week (massive decorations appeal to locals)
manageable: any remaining weekends - Fri-Sun not already mentioned; Martin Luther King Day; non-Easter Spring breaks
wonderful: mid-January, mid-February, mid-March, mid-Oct, early April, Nov & Dec workdays. Because DL is in-land, these months are typically mild weather.
I went & looked for your previous post. If it is very hot out, & you like that kind of weather, the park will not be crowded. We did this trip in '98 & had the park to ourselves. No wait for Indy Jones, Splash Mtn, all the biggies.