.
The first chapter of Genesis defines Days on earth as when the sun is up and
Nights on earth are when the sun is down.
And according to John 11:9-10, that's how people reckoned days and nights
in the gospel years: at least Jesus thought so anyway.
_
A day with God begins in the evening and ends in the morning
"So the evening and the morning were the first day."
Genesis 1
3 Then God said, “Let there be light”; and there was light. 4 And God saw the light, that
it was good; and God divided the light from the darkness. 5 God called the light Day, and the darkness He called Night. [
b]
So the evening and the morning were the first day.
6 Then God said, “Let there be a [
c]firmament in the midst of the waters, and let it divide the waters from the waters.” 7 Thus God made the firmament, and divided the waters which
were under the firmament from the waters which
were above the firmament; and it was so. 8 And God called the firmament Heaven.
So the evening and the morning were the second day.
9 Then God said, “Let the waters under the heavens be gathered together into one place, and let the dry
land appear”; and it was so. 10 And God called the dry
land Earth, and the gathering together of the waters He called Seas. And God saw that
it was good.
11 Then God said, “Let the earth bring forth grass, the herb
that yields seed,
and the fruit tree
that yields fruit according to its kind, whose seed
is in itself, on the earth”; and it was so. 12 And the earth brought forth grass, the herb
that yields seed according to its kind, and the tree
that yields fruit, whose seed
is in itself according to its kind. And God saw that
it was good. 13
So the evening and the morning were the third day.
~~~~~~~~~~~~~~~~~~
All days are described this way, not 12 midnight like we think of this.
So, the day begins with an evening when sun goes down and ends 24 hours later with the next evening, yeah it's confusing because we don't think like this.
There was also a full darkness that occurred for 3 hours during the crucifixion, which gives us an extra day.
We then can have 3 full days and 3 full nights, and have Christ rise in the morning on the 3rd day, which would be the end of the day.
Crucified on Friday, and raised on Sunday.
Mark 15:33
33 Now when the sixth hour had come, there was
darkness over the whole land until the ninth hour.
34 And at the ninth hour Jesus cried out with a loud voice, saying, “Eloi, Eloi, lama sabachthani?” which is translated, “My God, My God, why have You forsaken Me?”
Mark 16
Now when the Sabbath was past, Mary Magdalene, Mary
the mother of James, and Salome bought spices, that they might come and anoint Him. 2 Very early in the morning, on the first
day of the week, they came to the tomb when the sun had risen.
*************************************
But see here, Jesus had already risen, the tomb is empty!
The above ideas can give you another day.