How to Say "field day" in Spanish
The Spanish word for “field day” is “banquete” — B2 level.
English → SpanishB2
nounB2informal
having a great time with abundance

Examples
Me di un banquete de lectura este fin de semana.
I had a reading feast this weekend (I read a lot).
Reflexive use
When you use the phrase 'darse un banquete,' you are saying you 'gave yourself' a feast.
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