The thing is Jesus did not come on the fourth day of creation. Why confuse the issue? Man was not even made till the sixth day.
You are discussing Biblical Chronology. Didn't you and understand that from Adam to the 1st coming of Jesus passad on around 4.000 years?
Based in the Word of God, the source of the truth, on GOD's six Days of creation and one Day of rest (a total of seven days) plus the Scriptures that teach that one Day is with the Lord as a thousand years (2Pet.3:v.8), so MANKIND would go through six GOD Days of 1,000 years each (a total of 6,000 years) plus a Millennium of 1,000 years rest (now a total of 7,000 years).
According biblical Chronology, we can number our days starting in Genesis 5, as follow:
Adam lived ….....................................................130 yrs and begat Seth
Seth lived ………………………….......................105 yrs and begat Enosh;
Enosh lived ..........................................................90 yrs and begat Kenan;
Kenan lived...........................................................70 yrs and begat Mahalalel;
Mahalalel lived .....................................................65 yrs and begat Jared;
Jared lived .........................................................162 yrs and begat Enoch;
Enoch lived ..........................................................65 yrs and begat Methuselah;
Methuselah lived................................................187 yrs and begat Lamech;
Lamech lived .....................................................182 yrs and begat Noah;
From Noah´s birth until the Flood......................600 yrs.
Total of years from Adam to the Flood =.........1,656 yrs.
What prevails is the Word of GOD. I work with the Word of God. Notice that the table above is proved by the Word of GOD, it is not of human theories or human speculations. Let us study the times until our days not by human theories and speculations, but by the Word of GOD - the Word is GOD. So, see the table below:
SIX PERIODS OF BIBLICAL TIMES ----------------- DURATION
I - From Adam to the Flood- (Genesis 5)--------------1,656 years
II - From the Flood to Abraham-(Genesis 11&12)-----427 years
III - From Abraham to Exodus-(Gal.3:17)----------------430 years
IV - From Exodus to king Saul-(1Reis 6:1-480-84)----396 years
V - From Saul to the fall of Jerusalem ------------------.508 years
VI - From the fall of Jerusalem to Jesus ----------------.587 years
Thus, from Adam to the 1st coming of Jesus 4.004 years
NOW
From Jesus to our days (Christian Calendar)--------.2,021 years
Total from Adam to our days -----------------------------6,025 years
Now, now, don't you believe that the Word (the Word was GOD) was made flesh -JESUS- around TWO DAYS AGO, OR AT RIGHT TWO THOUSAND YEARS AGO?