'Day' in the Bible

And who [can] endure the day of his coming? And who [is] the one who can stand {when he appears}? For he [is] like a refiner's fire, like launderers' alkali.

"They will be mine," says Yahweh of hosts, "on the day that I [am] acting, [my] treasured possession. I will have compassion on them as a man has compassion on his son who serves him.

"For look! The day [is] about to come, burning like an oven, and all the arrogant and every {evildoer} will be stubble. The coming day will consume them," says Yahweh of hosts. "It will not leave behind for them root or branch.

You will trample down the wicked, for they will be ashes under the soles of your feet on the day that I [am] going to act," says Yahweh of hosts.

Look! I [am] going to send to you Elijah the prophet before the coming of the great and awesome day of Yahweh!