Utsava means
Srimad-Bhagavatam
SB Canto 3
Utsava means "pleasure."
SB 3.19.31, Purport: Although the Lord has His particular abode in which to reside, He is all-pervasive. The impersonalists accept one aspect of the Lord's features, the all-pervasive aspect, but they cannot understand His localized situation in His transcendental abode, where He always engages in fully transcendental pastimes. Especially mentioned in this verse is the word akhaṇḍitotsavam. Utsava means "pleasure." Whenever some function takes place to express happiness, it is called utsava. Utsava, the expression of complete happiness, is always present in the Vaikuṇṭhalokas, the abode of the Lord, who is worshipable even by demigods like Brahmā, to say nothing of other, less important entities such as human beings.