DeNA has announced a sepcial Happy Team Break Day event which will take place on April 1st, 2021.

Happy Team Break Day!

Special Event: Happy Team Break Day! under way! Team Break is up to something! Head to the Pokémon Center now to find out what's going on! Check out the Special Event: Happy Team Break Day!, which is now under way!

Date/Time

March 31, 2021 at 11:00 p.m. - April 1, 2021 at 10:59 p.m.

Note: During the event period, you cannot get items from speaking with Trainers at the Pokémon Center.

Important

• To participate, you must have completed Main Story Chapter 1: The More the Merrier (Normal) in single-player.
• The sync pairs that appear as opponents in battle have different capabilities than those you can actuallyobtain.
• The time period and featured content are subject to change without notice.

Source: https://pokemonmasters-game.com/en-US/announcements/Event_3030_1W_1