Where does “fiesta” come from?

Fiesta comes from Spanish fiesta, from Late Latin festa, from Latin festum meaning festival or holiday, ultimately derived from Proto-Indo-European dʰeh₁-.

fiesta (English): A religious festival; A festive occasion

Definitions

A religious festival; A festive occasion

Ancestry of “fiesta”, step by step

Step	Language	Word	Meaning
1	Spanish	fiesta	party; feast; feast day
2	Old Spanish	fiesta	—
3	Latin	fēsta	—
4	Latin	festum	a holiday, festival; a banquet, feast
5	Latin	fēstus	—
6	Proto-Italic	fēstos	—

Every word from Proto-Italic fēstos →

fiesta — Etymology, Origin & Word History | Etymology Explorer