King James Version (KJV) - Mark 6:21 >

And when a convenient day was come, that Herod on his birthday made a supper to his lords, high captains, and chief [estates] of Galilee;

Berean Study Bible (BSB) - Mark 6:21 >

On Herod’s birthday, her opportunity arose. Herod held a banquet for his nobles and military commanders and the leading men of Galilee.

Textus Receptus (TR) - Mark 6:21 >

Καὶ γενομένης ἡμέρας εὐκαίρου, ὅτε Ἡρῴδης τοῖς γενεσίοις αὐτοῦ δεῖπνον ἐποίει τοῖς μεγιστᾶσιν αὐτοῦ καὶ τοῖς χιλιάρχοις καὶ τοῖς πρώτοις τῆς Γαλιλαίας,