What to know about 4/20, marijuana’s biggest day of the year in Arizona and nationwide

 What to know about 4/20, marijuana’s biggest day of the year in Arizona and nationwide

Arizona Department of Health Services records show that April 20th is by far the biggest sales day for marijuana in the state.

The 20th day of April means even more to Marvina Thomas than most cannabis fans: The now-popular date is in the name of her first cannabis-related company. And on 4/20, she plans to open the first Ar…