Some interesting math:
1000 years = 1 day ("a thousand years as one day" 2 Peter 3:8)
1 day = 24 hours ("and there was evening and there was morning, one day" Gen 1:5)
1000 years = 1 day = 24 hours
1000 years = 24 hours
1000 years = 24 hours
........24................24
41.666 years = 1 hour
From the Cross of Christ around 30AD to the last physical temple's destruction in 70AD was about 40 years
1 John 2:18 ~ written around 63AD
18 Children, it IS [present tense ~63AD] the last hour;
and just as you heard that antichrist is coming,
even now many antichrists have arisen;
from this we know that it IS [present tense ~63AD] the last hour.
2 Peter 3:8-9
8 But do not let this one fact escape your notice, beloved, that
with the Lord one day is as a thousand years,
and a thousand years as one day.
Genesis 1:5
5 And God called the light day, and the darkness He called night.
And there was evening and there was morning, one day.
NASB