Woe unto you that desire the day of the LORD! to what end is it for you? the day of the LORD is darkness, and not light. As if a man did flee from a lion, and a bear met him; or went into the house, and leaned his hand on the wall, and a serpent bit him. Shall not the day of the LORD be darkness, and not light? even very dark, and no brightness in it? – Amos 5.18-20
There are a lot of folks who are looking forward to the ‘day of the Lord.’ For those who truly know God and have put their trust in Him that is a good thing. We ought to look every day to the day of the Lord.
But not everyone who is looking for the day of the Lord is going to be happy when that day comes. For many who are trusting in their works or their goodness or their own self-righteousness the day of the Lord is only going to be a day of judgement on their sins.
The day of the Lord, when He appears in all His glory should be a great day of joy. It should not be like running from a lion only to run into a bear and be destroyed. It should not be a day of darkness, but a day of great light.
And it will be light and joy for all who have put their faith in Him.