Last Day
International Standard Bible Encyclopedia [1]
(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 .
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.