salci -sla- gismu

x1 celebrates/recognizes/honors x2 (event/abstract) with activity/[party] x3.

x3 (and nunsla) festival/fiesta/celebration/occasion/fair/Holiday (some senses). not limited to the ameliorative interpretation of 'celebrate': funeral (= mrobixsla). See also sinma, jbena.

In notes:

jbena
x1 is born to x2 at time x3 [birthday] and place x4 [birthplace]; x1 is native to (fo) x4.
sinma
x1 esteems/respects/venerates/highly regards x2 [object of respect].
bujyjbenunsla
n1 is the Vesak celebrated by s1 with activities s3.
dansycu'u
c1 is a dance/ball involving participants c2=d1, to accompaniment/music/rhythm d2.
gusnunsla
n1 is Diwali (Deepavali) celebrated by s1 with activities s3
si'artersla
sl3 is an ceremony/celebration for recognizing/honoring si2 (object of esteem) with participants sl1=si1.
tersla
s3 is a activity/[party] for celebrating/recognizing/honoring s2 (event/abstract) with participants s1.
xislivnunsla
n1 is Easter celebrated by s1 with activities s3