1 Thessalonians 2:12
That ye would walk worthy of God, who hath called you unto his kingdom and glory.
So you think this "kingdom" is only a thousand years?
Here is an interesting synergy:
"For a thousand years in thy sight are but as yesterday when it is past, and as a watch in the night." - Pslam 90:4 KJV
1) Psalm 90:4 describes a thousand years as a watch in the night.
2) The parable of the wedding banquet in Matthew 22 describes individuals invited but wilfully refused and murder the messengers. These individuals that rejected the invitation and murdered the messengers are destroyed and their cities burned. Parties that were not originally on the invitation list are added. Of those invited, the ones that were not in wedding attire were bound and thrown out of the banquet. Not all who were invited were chosen (one should put on Christ to satisfy the attire requirement).
3) The parable of the ten virgins in Matthew 25 describes an awakening at midnight in the time of the kingdom of heaven (a watch in the night?) for virgins to attend a wedding banquet. Each virgin intended to attend but only some had their lamp oil ready and some had to detour to buy their oil. Upon returning from the detour, those that did not have their oil ready at the right time were refused entry.
If the 1000 years described in Revelation 20 also correlates to these parables about the kingdom of heaven and the wedding banquet, the timeframe is figurative and there are other elements we may infer. Namely: not all those who are invited to the resurrection at the beginning of the "1000 years" will be saved. Although Rev 20 speaks of a first resurrection and other passages denote a "resurrection unto salvation and a resurrection unto damnation" but it may be interpreted that those two resurrections are actually descriptions of types instead of chronological instances. It may be the case that the references in Rev 20 describe instances that are a mix of types. This interpetaton works with the concept that some may attend the banquet (the 1000 years) but ultimately be cast out into a place of wailing and gnashing of teeth (invited but not called or chosen), and also works with the concept that the second resurrection happens at a later period in the night (based on the parable of the ten virgins).
There are some references in Matthew and Revelation about the sun being blocked out and essentially a time of literal darkness or light impairment. They may be related to the concept of a "watch in the night" and may add flavour but aren't critical for the interpretation. A literal darkness isn't necessary for the interpretation. The entertaining part of the interpretation is that this would make Satan something like a wedding crasher at the end of the 1000 years when he is loosed.