1 Thessalonians 5:2
2For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
Who is the Lord? Jesus. Who comes like a thief in the night? Jesus.
Matthew 24:42-44
42Watch therefore: for ye know not what hour your Lord doth come. 43But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up. 44Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh.
The day of the Lord is the day of Christ. After Christ, our Lord, comes there's wrath. There's way too much material to post here, but there's your starter. I recommend paying close attention to what happens on the day of Christ or day of the Lord and how He comes as a thief. I hope that helps.
This occurs immediately after the great tribulation.
2For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
Who is the Lord? Jesus. Who comes like a thief in the night? Jesus.
Matthew 24:42-44
42Watch therefore: for ye know not what hour your Lord doth come. 43But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up. 44Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh.
The day of the Lord is the day of Christ. After Christ, our Lord, comes there's wrath. There's way too much material to post here, but there's your starter. I recommend paying close attention to what happens on the day of Christ or day of the Lord and how He comes as a thief. I hope that helps.
This occurs immediately after the great tribulation.
The day of Christ is the gathering of the church, which Paul uses in the letter to the Philippians
"Do everything without complaining or arguing, 15so that you may be blameless and pure, children of God without fault in a crooked and perverse generation, in which you shine as lights in the world 16as you hold forth the word of life, in order that I may boast on the day of Christ that I did not run or labor in vain.
"I thank my God every time I remember you. 4In every prayer for all of you, I always pray with joy, 5because of your partnership in the gospel from the first day until now, 6being confident of this, that He who began a good work in you will carry it on to completion until the day of Christ Jesus.
"And this is my prayer: that your love may abound more and more in knowledge and depth of insight, 10so that you may be able to test and prove what is best and may be pure and blameless for the day of Christ"
The Day of Christ then, is when the Lord appears to gather His church. In opposition, the Day of the Lord is the time of God's wrath:
"Behold, the Day of the LORD is coming—cruel, with fury and burning anger—to make the earth a desolation and to destroy the sinners within it."
"I will completely sweep away everything from the face of the earth,” declares the LORD.
I will sweep away man and beast; I will sweep away the birds of the air, and the fish of the sea, and the idols with their wicked worshipers.
I will cut off mankind from the face of the earth,”
Day of Christ = the appearing of the Lord and our being gathered to Him
Day of the Lord = The time of God's wrath, which will be carried out via the seals, trumpets and bowl judgment of Revelation
The Day of Christ takes place first with the gathering of the church, with the Day of the Lord, the time of God's wrath to follow.