When I was growing up stores did not open on Sunday,
with the exception of a few convenience stores that
generally only opened after 1pm (when church services
were generally over).
I grew up in North Carolina, deep in the Bible belt.
we had what were often referred to as “blue laws.”
Blue laws which have been part of U.S. legal history since
the colonial period. These laws, which today are usually
referred to as Sunday closing laws, prohibit certain types
of commercial activity on Sundays.
Things have changed drastically since my youth 
Today, I noticed construction workers working in a
sub-division near where I live, lawn services mowing
lawns, and of course internet marketers sending mailings
out. I even sent out an email broadcast.
Sunday is no longer a day of rest. It’s a day when you
“might” have a better chance of making a sale since the
email volume is lower.
I don’t know whether it’s the recession or just changing
attitudes… but Sundays are now often just another
work day.
Just making an observation and reflecting.
For the biblical scholars, Exodus 20:8 is where you’ll
find the commandment “Remember the Sabbath day by keeping it
holy” 
Willie