No, if you see a or the thousand years, it is 1000 years.The term "a thousand years" is in reference to that vague time period, when Jesus revealed that He did not know the day of His return, but the Father only.
If you listen to the words, "with the Lord, one day is as a thousand years, and a thousand years as one day" 2 Peter 3:7-8, you will find that it is connected to God's longsuffering for our repentance and salvation, aka the Age of God's Grace, which is NOW, ever since Pentecost.
"A thousand years" is just colorful way of saying for a long period of time, having no desgnated end, until people on the earth FAIL to believe "that God is". Hebrew 11:6
For without faith in God, no one can come to repentance. Therefore, In that day, then shall the end come-2 Thes. 2:3, and for no other reason.
That is what Jesus did know about His return!
He questioned if he would find faith on the earth, when He returns Luke 18:8.
The answer is NO!
Apart from His sealed Saints, alive at that time, all others will have "fallen away"- 2 Thessalonians 2:3.
This was said 6 times in a row.
It would be akin to Jesus saying, verily, verily, verily, verily, verily, verily i say unto you....1000 years.