It's time spent in the tomb, not dead, as Jonah was in the whale.
1. Entombed at sunset, Wednesday. To daybreak Thursday = 1 night.
2. Thursday sunrise to sunset = 1 day, 1 night.
3. Thursday sunset to Friday sunrise = 1 day, 2 nights.
4. Friday sunrise to Friday sunset = 2 days, 2 nights.
5. Friday sunset to Saturday sunrise = 2 days, 3 nights.
6. Saturday sunrise to sunset = 3 days, 3 nights in the tomb.
He rose after being in the tomb 3 days and 3 nights as he prophesized. He rose on the 3rd day.
Snce this post actually responds to posts I’ve made, I’ll answer it (as opposed to HarrymeHome and Diego1618 who both make arguments I’ve responded to several times.):
>> He rose after being in the tomb 3 days and 3 nights as he prophesized. He rose on the 3rd day. <<
The problem with this line of reason is that the statements that Christ will rise or rose on the third day all refer to his dying, and rising on the third day. None of the twenty-something references to rising on the third day say anything about being in a tomb or being buried.