What is "the day of the L-RD" found in Isaiah 13:6 and elsewhere and when does/did it occur?:
JPS Tanakh 1917 Isaiah 13:6 Howl ye; for the day of the L-RD is at hand; As destruction from the Almighty shall it come.
It seems to be described as a day of judgment. Is it a day of judgment primarily on the nations or on Israel?
Also, is it associated with the arrival of the messiah?