5 In the first month, on the fourteenth day of the month in the evening, is Yahweh's Passover.
*Minor differences ignored. Grouped by changes, with first version listed as example.
In these verses, the Passover, or Paschal Supper, and the Feast of Unleavened Bread, are plainly spoken of as distinct feasts. See Exodus 12:6, Exodus 12:15, Exodus 12:17; Numbers 28:16-17.
See Exodus 12:6. According to the Hebrew mode of reckoning, the 15th day of the month began on the evening of the 14th. The day of holy convocation with which the Feast of Unleavened Bread commenced Leviticus 23:7 was the 15th, and that with which it terminated was the 21st. Compare Numbers 28:16-17.
The Lord's passover - See this largely explained in the notes on Exodus 12:21-27 (note).
In the fourteenth day of the first month,.... The month Nisan, the same with Abib, the month in which the children of Israel came out of Egypt, for which reason it was made the first month in the year, answering to part of our March and part of April; and for the same reason was the passover kept at this time, as follows:
at even is the Lord's passover; that is, that was the time for the keeping the passover, even "between the two evenings", as it may be rendered; from the sixth hour and onward, as Jarchi, trial is, after noon or twelve o'clock the middle of the day, as Gersom, when the sun began to decline; See Gill on Exodus 12:6.
THE PASSOVER. (Leviticus 23:5-8)
the Lord's passover--(See Exodus 12:2, Exodus 12:14, Exodus 12:18). The institution of the passover was intended to be a perpetual memorial of the circumstances attending the redemption of the Israelites, while it had a typical reference to a greater redemption to be effected for God's spiritual people. On the first and last days of this feast, the people were forbidden to work [Leviticus 23:7-8]; but while on the Sabbath they were not to do any work, on feast days they were permitted to dress meat--and hence the prohibition is restricted to "no servile work." At the same time, those two days were devoted to "holy convocation"--special seasons of social devotion. In addition to the ordinary sacrifices of every day, there were to be "offerings by fire" on the altar (see Numbers 28:19), while unleavened bread was to be eaten in families all the seven days (see 1-Corinthians 5:8).
*More commentary available at chapter level.