Yes, there will be a pokemon day presents, but don't think its big, its some nice updates and some other things

Pokemon unite: 2 New fighters, Scizor and Crabominable, and a pokemon birthday event

Pokemon go, hisuian sneasel and hisuian qwilfish will start appear, but without evolutions yet

Pokemon detective pikachu 2 (movie + game) game and movie sequels launch thogether, at october (day tbd) there will be some connections between movie and game but distinct stories and characters

Pokemon Legends arceus and BDSP home connection

BDSP is just like swsh

Pla has a new free update, with a new quest-line (unlocks after beat the main-story):
>a new character appears near to the exit gate. Remembers P. Elm but it is a woman.
>It will ask you many requests: porygons complete dex, weavile dex, some items
>Totodile and chikorita lines are in the New update(snivy, tepig, popplio and litten are not)they came from johto with female Elm. No new evo
>this new quest ends with this new npc building a time capsule that is the Home connection, anyways the quest doesn't longer more than 15 minutes if you finished the game