Last Day

From BibleEncyclopedia.Net

(ἡ ἐσχάτη ἡμέρα, hē eschátē hēméra):

Repeatedly used by Jesus in Jn (John 6:39, John 6:40, John 6:44, John 6:54; John 11:24; John 12:48) for the day of resurrection and judgment (see Eschatology Of The New Testament). Compare the usage in the Old Testament (Isaiah 2:2; Micah 4:1) and the New Testament (Acts 2:17; 2 Timothy 3:1; 2 Peter 3:3; 1 John 2:18; Judges 1:18) of “last days” and “last time” to denote the Messianic age. See Latter Days; Last Days; Last Time; Last Times.

In John 7:37, “the last day, the great day of the feast” refers to the eighth day of the feast of Tabernacles. This closing day was observed as a Sabbath (Leviticus 23:36). On it the libation of water made on other days was not made; hence, the allusion of Jesus to Himself as the Giver of the living water.