This phrase is used rhetorically to express disbelief, surprise, or irony when something unusual or unexpected happens regularly. Literally translates to 'When is it not Easter in December?' but in slang context it means 'When is this not happening?'
Examples
- Spanish: ¿Cuándo no es Pascua en diciembre? Siempre te encuentro en esta biblioteca.
- English: When is this not happening? I always find you in this library.