>>801410
A day started at 7pm, not midnight.
>>801403
Thursday evening (Friday): Last Supper.
Thursday night to Friday morning (Friday): Jesus is arrested and tried, first by the Jews, then by the Romans.
Friday (Friday): Jesus is crucified, at about 9am.
Friday (Friday): Darkess falls upon Jerusalem, at about noon.
Friday (Friday): Jesus dies on the cross, at about 3pm. He is then buried. One day.
Friday evening (Saturday): Jesus lies in the tomb, while the Jews eat the Passover. One night.
Saturday (Saturday): Jesus remains in the tomb. One day.
Saturday evening (Sunday): Jesus remains in the tomb. One night.
Sunday (Sunday): Jesus rises from the dead. One day. The disciples later find out.
So really, Jesus remained in the tomb for 3 days and 2 nights… But "3 days and 3 nights" is a way of speaking, it doesn't have to mean exactly 3x24 hours. Jesus was indeed in the tomb on Friday, Saturday, and Sunday.