Commentaries:
Melchizedek (Christ) offers bread and wine to Abram. Working back from the events of Genesis 15, the understanding of "the selfsame day" of Exodus 12:41 and Christ's institution of the bread and wine during His final Passover, this likely occurred at the beginning of the 14th, perhaps even at twilight.
John W. Ritenbaugh
Countdown to Pentecost 2001