Jesus was buried on the feast day called Unleavened Bread, at sundown following Passover.

Our “kernel of wheat” died and was buried, then He produced many seeds. John 12:23-24
 
Jesus identified the 3rd wine cup of redemption as His blood. Matt.26:27-29

To appreciate His blessing on this cup, you need to understand the Jewish marriage customs.
 
The groom had to approach the bride with a contract, which they would both sign. He would pay a price to her father, and they would drink a toast with wine.
 
Then the groom would tell her, “I go to prepare a place for you in my father’s house.” John 14:2-3

The groom would build a room onto his father’s house for the honeymoon.
 
The bride waited until the groom returned. She had been bought for a price. 1 Cor.6:20

She kept her oil lamp ready; the groom might come at midnight to surprise her. Matt.25:1-13