Psalm 95:7-11  and Heb 3:13

The writer of Hebrews is quoting Psalm 95:7-11.  In both
cases, those words were calling "TO DAY" the time to hear
the voice of the LORD and repent.  

"TO DAY" is a limited time of grace. In it, man has an
opportunity to make decisions and prepare himself for
THAT DAY of God's judgment.

"TO DAY" belongs to man for making his judgments.  The
scriptures are setting it in contrast to THE DAY OF THE
LORD, a period of divine judgments.

     "But exhort one another daily,
         WHILE IT IS CALLED TO DAY;
     lest any of you be hardened
         through the deceitfulness of sin."
                      Heb 3:13 (KJV)

Most certainly, Psalm 95 had nothing to do with Sunday worship!
The whole chapter is calling Israel to repentance from their
apostasy of worshipping other gods.  It is calling them to honor
the only true God. (Who created the heavens and the earth.) The
Sabbath Commandment makes that distinction ...

     "Remember the sabbath day, to keep it holy.
           Six days shalt thou labour,
                and *do all thy work*:

      But the seventh day is the sabbath
            of the LORD thy God:
      in it thou shalt not do any work, thou, nor
      thy son, nor thy daughter, thy manservant,
      nor thy maidservant, nor thy cattle, nor
      thy stranger that is within thy gates:

     For in six days the LORD made heaven and earth,
     the sea, and all that in them is,
     and **rested the seventh day**:
     wherefore the LORD blessed the sabbath day,
     and hallowed it.  Exod 20:8-11 (KJV)

Donna Kupp