I think there is a law restricting sales times, but I really don’t know.
There indeed be such a cruel and unusual law. Unnatural to boot. Still better than other places. When I moved to Texas 30+ years ago. It really surprised me to see fireworks on sale in December. But then I found out that most cities ban them all the time. The bigger the city, the more anal they are about enforcing the ban. I expect to see lots of fireworks tomorrow night here in Killeen.
Of course the best fireworks around here are 25 mm, 105mm, 120mm and a few 155mm "boomers". The big 'uns literally rattle the windows. Cool beans.