According to the update page dedicated to this Community Day, the two locations in Malaysia are listed as:

Penang​: Paragon Mall – Festive SquareKuala Lumpur: Desa Park City – Park entrance, Wooden deck (Next to Jibby by The Park)

Check the link below to see if there’s one happening near you.👉https://t.co/dgdCNNjaWE pic.twitter.com/BitxmW1So9 — Pokémon GO (@PokemonGoApp) April 18, 2022 Be at the aforementioned locations, and you’ll receive special postcards, as well as access to event-exclusive PokeStops. The post also notes that no registrations are required to take part. You can also participate in the Pokemon Go Community Day without actually being there, but you’ll naturally miss out on the special postcards. The dev team also claims to have worked with local authorities to ensure that the Pokemon Go Community Day is compliant with COVID-19 prevention SOPs. Then there’s the obligatory note that “upcoming events are subject to change”. if you’re still a fan of the game, and have nothing planned for the weekend, then this may be something for you to add to your calendar. (Source: Niantic)