John Gill - Exposition
John Gill
And when a convenient day was come,.... For Herodias; who had long sought and watched for an opportunity of avenging herself on John, and such a time Herod's birthday proved; though some think, that this phrase is the same with יום טוב, "a good day"; often used by the Jews for a festival, any one of their feast days; there is a tract in their Misna which bears this name; and that such a day was...