To commemorative World Sleep Day, Pokémon Sleep is giving players a World Sleep Day Commemorative Gift which features: a Growth Incense, a Focus Incense and 5x Poké Biscuits.

World Sleep Day Commemorative Gift

March 15, 2024, is World Sleep Day! We wish for all you researchers to have good, comfortable sleep, so we are giving each player* the following gifts. You can accept them by tapping on the gift box icon in the upper right of the main menu.
*Players who logged in before 2024/03/31 14:59.

• Growth Incense ×1
• Focus Incense ×1
• Poké Biscuit ×5

We hope you’re able to make good use of these gifts and continue to enjoy sleep research with Snorlax and other Pokémon.

Source: https://www.pokemonsleep.net/en/news/5247/