once upon a time in Spanish
once upon a time in Spanish
érase una vez
A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).
había una vez
A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).
era una vez
A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).