When does the day of the Lord begin and what time period does it cover?

Les teaches that the term "the day of the Lord" in 2 Peter 3:10 actually begins with the onset of the tribulation and goes all the way through the seven years as well as the thousand-year kingdom. He notes that theologians debate which parts are eternal and which are still in the kingdom, but he sees these verses as giving the reason for Revelation 21. The day of the Lord will come as a thief in the night, catching the world by surprise. Les points out that the semicolon in the verse can indicate a gap, because punctuation marks in Scripture can sometimes skip a thousand years or more. Then the heavens pass away with a great noise, and the elements melt with fervent heat. Peter, an uneducated fisherman, uses terms scientists still use today, such as elements that make up the earth.