Last day? Well there are 11 mentions of the last days in the New Testament. None of them can be place outside of the first century with the end of the old covenant age in AD 70. Start with Acts 2 and Hebrews 1. See my blog www.prophecyquestions.wordpress.com.
“None of them can be place outside of the first century with the end of the old covenant age in AD 70.”
The general resurrection of the dead has not happened and yet Jesus said it would happen on the Last Day. Thus, the Last Day is “outside of the first century”.