Hi
Free
Well personally, I've always believed that these passages speaking of God and a thousand years like unto a day is merely teaching us that God stands outside of how we see and understand time. God does not live where there are days and the sun and moon create morning and night. He lives outside of this realm of His creating, although He can be in it at any time that He would desire. So, call it simile or metaphor or whatever human word one might choose to define these passages where God speaks of His understanding and living in time is different than ours, but that's really, I believe, all that it teaches us.
Now, this idea that the earth might exist for 6,000 years before the 1000 year reign of Jesus, are merely ideas that we feel might be the truth of God's laying out of time upon the earth, but it is just an idea and there is no Scriptural support that it is, in fact, the truth of 'when' the end will come and Jesus will return. However, in looking out at the wickedness of the world and what the Scriptures describe as the way the world will be going when Jesus does return, I can see that the time may be very, very close. By that 'close', I mean within the next 1-300 years.
The beast is here, and the people are definitely at the stage where we are inventing wickedness. So, just a couple of signs that the end is, in fact, coming upon us. But will it yet be 3 weeks or 100 years is not yet known by the signs. But they will become more evident as we walk inexorably into the last days of this created realm which God has made for mankind to come to know Him and to choose Him over wickedness.