Pokémon Sleep will undergo maintenance on Wednesday, March 31 at 4:30 AM (UTC) for an update to Version 3.4.0. This maintenance period is expected to last about four and a half hours, concluding at 9:00 AM (UTC).
This update prepares the game for the Latias research event, which will start on April 6. It also includes minor balance adjustments for the Pokémon Absol and Kangaskhan.