From Wiktionary, the free dictionary
Borrowed from French repos (“rest”).
ρεπό • (repó) n (indeclinable)
- (colloquial) day off, rest day, one day holiday
Έχω ρεπό κάθε δεύτερη Tρίτη.- Écho repó káthe défteri Tríti.
- I have a day off every second Tuesday.