"dpc_event_fall21": "2021 Fall League",
"dpc_event_fallmajor21": "2021 Fall Major",
"dpc_event_winter22": "2022 Winter League",
"dpc_event_wintermajor22": "2022 Winter Major",
"dpc_event_spring22": "2022 Spring League",
"dpc_event_springmajor22": "2022 Spring Major",
Source: https://www.reddit.com/r/DotA2/comments/ozrkwm/3_majors_upcoming_to_next_dpc_season_2022/