John Gill Commentary Luke 22:1

"Now the feast of unleavened bread drew nigh, which is called the Passover." — Luke 22:1 (ASV)

Now the feast of unleavened bread drew nigh Which lasted seven days; during which the Jews eat their bread without leaven, in commemoration of the haste in which they went out of Egypt; being such, that they had not time to leaven their dough, but took it with their kneadingtroughs along with them, as it was; and as figurative of the unleavened bread of sincerity and truth, with which the Gospel feast is to be kept; see (Exodus 12:34) (1 Corinthians 5:8) .

Which is called the passover ; because the Lord passed over the houses of the Israelites, when he slew all the firstborn in Egypt; now the time of this feast drew near, when the conspiracy was formed against the life of Christ: Matthew and Mark are more precise, and suggest, that it was two days before the passover; see (Matthew 26:2) (Mark 14:1) .