'Day' in the Bible

For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?

Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:

Instead, continue to encourage one another every day, as long as it is called "Today," so that none of you may be hardened by the deceitfulness of sin,

For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works.

Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.

For if Jesus had given them rest, then would he not afterward have spoken of another day.

So Christ also glorified not himself to be made a high priest, but he that spake unto him, Thou art my Son, This day have I begotten thee:

The teaching of baptisms, and of the putting on of hands, and of the future life of the dead, and of the judging on the last day.

He doesn’t need to offer sacrifices every day, as high priests do—first for their own sins, then for those of the people. He did this once for all when He offered Himself.

Not according to the covenant that I made with their fathers in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, and I regarded them not, saith the Lord.

But into the second, the High Priest goes only on one day of the year, and goes alone, taking with him blood, which he offers on his own behalf and on account of the sins which the people have ignorantly committed.

Every priest stands day after day ministering and offering the same sacrifices time after time, which can never take away sins.

Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.