'Day of the Lord' in the Bible

Wail, for the day of the Lord is near!It will come as destruction from the Almighty.

Behold, the day of the Lord is coming,Cruel, with fury and burning anger,To make the land a desolation;And He will exterminate its sinners from it.

“If because of the sabbath, you turn your footFrom doing your own pleasure on My holy day,And call the sabbath a delight, the holy day of the Lord honorable,And honor it, desisting from your own ways,From seeking your own pleasureAnd speaking your own word,