Jesus is generally understood by Christians to have been resurrected on Sunday , the first day of the week. The New Testament says the tomb was found empty early that morning, and many Christian traditions call that day Easter Sunday.

Why Sunday?

The usual reading is:

  • Crucified on Friday.
  • In the tomb on Saturday.
  • Resurrected by Sunday morning.

Why some people say “the third day”

In ancient day-counting, parts of days could count as whole days, so Friday to Sunday could be described as “on the third day”. That is why different Christian groups can agree on the resurrection while describing the timing a little differently.

If you want, I can also give you the Bible verses behind this in a very short list.