I have no idea why the laws were called the blue laws but they are history:
You can now buy beer at breakfast time on Sundays, as New York says bye-bye to the blue laws. Gov. George Pataki signed into law Thursday a bill allowing beer sales to start at 8 a.m., superseding the former start time of noon. The midday law was part of the decades-old blue laws to regulate Sunday activities. Calling the old blue laws archaic, the justification for the new law noted that "(It) will make it easier for people traveling and families picnicking to stop at the store in the morning to get their groceries for the day."I have had the experience of waiting in a grocery line-up at 11:43 am only to be told I had to go back and check out the cereal aisle a few more times. Nice to see a Republican leader who appreciates that beer is a proper part of a Sunday picnic.