(he eschate hemera):
Repeatedly used by Jesus in John 6:39,40,44,54; 11:24; 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; Jude 1:18) of "last days" and "last time" to denote the Messianic age.
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.
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