The Case for Sunday

“First day” texts.

Matthew 28:1
Mark 16:2, 9
Luke 24:1
John 20:1

John 20:19
Acts 20:7

1 Corinthians 16:2

“Lord’s day.”
Revelation 1:10

Do any of these contain a Divine Instruction to change the day of  Worship?
Does anyone but God have the authority to do it?

Sundry objections
Romans 14:5 Context is v.1 “disputes over doubtful things.”
v.2, 6 speak of food suggesting that this passage is talking of fast days which some thought important, others not, but it didn't matter.
Paul in another place upheld the commandments of God while saying circumcision was not important. (1 Corinthians 7:19.)

Galatians 4:10 “Observe days and months and seasons.”
            i.  It doesn't specify the Sabbath.
            ii. Listing with months and seasons suggests something ceremonial,
                or maybe fast days.
            Whatever it was, their attitude was wrong - they though doing led to salvation.

Colossians 2:14-16   What was nailed to the cross?
    The word translated “handwriting” can mean a signed statement of acknowledged
    guilt. i.e. our sins were nailed up.
    v. 8 = context -beware of deception following man’s tradition, not Christ.
    Men’s tradition does not save, Jesus does.
    v. 16. Is there anything wrong with eating and drinking? No, but they can be misused.
    Likewise there is nothing wrong with the Sabbath.
    But it can be misused by being made a means of salvation.

None of these give support to the observance of Sunday.