It was the day of Preparation, and the Sabbath was beginning.
We have here an account of Christ's burial; for he must be brought not only to death, but to the dust of death (Psa 22:15), according to the sentence (Gen 3:19), To the dust thou shalt return. Observe, I. Who buried him.
Commenting on Luke 23:50-56
And that day was the preparation, and the sabbath drew on. (k) Literally, "dawning", and now beginning, for the light of the former day drew toward the going down of the sun, and that was the day of preparation for the feast, that is, the feast which was to be kept the following day.
And the Sabbath drew on - Or, The Sabbath was lighting up, επεφωσκε, i.e. with the candles which the Jews light just before six in the evening, when the Sabbath commences. The same word is used for the dawning of the day, Mat 28:1. Wakefield.