Niantic has announced that the Thundurus and Cobalion events have been extended until
Tuesday, March 31, 2020, at 1:00 p.m. PDT (GMT −7). Raid Hour has been canceled until further notice.
Our list of COVID-19 canceled Pokémon Events has been updated with this announcement.
Updates to events: Thundurus and Cobalion extended, Raid Hour canceled
Trainers, The following events have been canceled, postponed, or changed.
- Thundurus in five-star raids: This event has been extended until Tuesday, March 31, 2020, at 1:00 p.m. PDT (GMT −7).
- Cobalion in five-star raids and as GO Battle League rewards: This event has been extended until Tuesday, March 31, 2020, at 1:00 p.m. PDT (GMT −7).
- Raid Hour (every Wednesday at 6:00 p.m. local time): This event has been canceled until further notice.
Source:
https://pokemongolive.com/en/post/updates-20200327/