Be careful how others may miss this one fact from Genesis 1:2-5,... DARKNESS was there, THEN Light. It repeats, for our understanding, "and evening and morning were the first day" and so on,... read for yourself and ask The Holy Spirit to reveal truth as HE gave it to us right in plain sight. The "seals" have been opened to those who have eyes to see.
Hebrews count the day correctly, it begins at sunset. Before The Passover Lambs were put in the oven, (Gentile Wednesday evening before sundown) Messiah was put in the tomb. Because they hurried and asked for His Body "before" sunset so they could eat the Passover.
So, think about it, All night it was Thursday night, then Thursday day. 1 day. At next night, sunset begins Friday night, then Friday day day 2. at sunset, Shabbat, begins Saturday night then Saturday day 3 days and 3 nights and early before the sunrise on the first day of week (our Sunday) the tomb was empty.
This is the way Israel/Hebrews (Jews) counts days. See how backwards/twisted, total opposite HaSatan has made it to confuse us?
My intent in responding is to give what was given to me, I needed this answer for myself too. I never understood how some religious systems could get 3 days and 3 nights out of "good Friday to SUNDAY!!! DOESN'T ADD UP.
May The Peace of God rule in our hearts brothers. Keep seeking, asking, knocking.