I will be in Seoul on 22 May.
What activities will be happening for Buddha’s birthday celebrations and what would be the best areas to go to experience things from a local perspective?
Any temple, honestly. Not like public in the square events.
Bongeunsa or Jogyesa in Seoul.
If you have much time, go to any far-locating huge temple with many good reviews.
Jeondeungsa, Baekdamsa, Haeinsa, Tongdosa, Guinsa, Songgwangsa, Seonamsa, Samgwangsa, ....
Still Jogyesa. You will probably be close anyway.