παννυχίζειν
From LSJ
ἤτοι ἐμοὶ τρεῖς μὲν πολὺ φίλταταί εἰσι πόληες Ἄργός τε Σπάρτη τε καὶ εὐρυάγυια Μυκήνη → The three cities I love best are Argos, Sparta, and Mycenae of the broad streets
(see also παννυχίζω): celebrate a nightly festival, keep a night festival
