Jesus was revealed as the Lamb of God at the very end of the fourth day (twilight) therefore I have the fifth day on the Biblical timeline starting from that point onwards.

However one could perhaps debate whether the fifth day began 

• with His birth when He came from Heaven as the Lamb of God, 
• His baptism at the Jordan when John first proclaimed Him as 'the Lamb of God who takes away the sins of the world' 
• or at Calvary where He truly was revealed to all the world for all time as the Lamb of God. 

The difference in time between these three points is only some 33 years. Not a lot of years to fuss over in the early or middle points in church history, but now having past the year 2000 on the world's calendar those years take on an interesting aspect!

The world's calendar is divided into B.C and A.D - meaning the years before Christ's birth and the years since Christ's birth.

It is accepted by all scholars that Dionysius Exiguus - the monk who did the calculations - got the year of Christ's birth wrong, but there is no firm agreement by how much!

Opinions vary from one year out to six years out.

If we set the start of the 'fifth day' from Christ's crucifixion (as I have) then when the calendar finally reached the year 2000 it could actually have been anywhere from 1961 A.D  to 1966 A.D on God's calendar timeline.

If we were instead to set the start of the 'fifth day' from Christ's birth, then when the calendar finally reached the year 2000 A.D it could actually have been anywhere from 1994 A.D to 1999 A.D on God's calendar timeline.

To complicate things a bit more the Jewish calendar has the year 2000 as 5760 from creation.

I believe God has allowed this uncertainty as it prevents us falling into the trap of date setting.

It is enough for us to know that we are now coming towards the very end of the sixth day and the events that come with that end period.