In Tehillim 90:15 we have the following:
שמחנו כימות עניתנו שנות ראינו רעה
The Ramchal wrote in Maamar haGeulah that this cannot be a one to one equation, for there aren't enough years left before the seventh millennium for us to enjoy in a state of Geulah as we have had suffering in Galut. Therefore, what it means is that the supernal light that we could have received during the years of Galut will be given to us when the redemption arrives.Make us happy like the days that You have afflicted us, the years we saw evil.
I would like to propose the following.
After the Nesira is complete, Malchut is built from a single point in to a full partzuf by Z"A. The years in which Malchut is a full partzuf of ten sefirot count as ten times the amount as when Malchut is but a single sefirah. Using this line of thought, we see that Malchut becomes a full partzuf towards the beginning of the eighth hour of the sixth day.
The approximation works as follows:
(6001-yearX) * 10 = 70 years of Galut Bavel + (yearX - 3830)