April 20 is an important day of the year on the calendar of cannabis connoisseurs. It’s 4/20 — marijuana’s high holiday — a day to celebrate the drug and advocate for its legalization. For dispensaries, it can also be a high-volume day of sales on discounted products. But one Massachusetts cannabis company, including its three dispensaries, will be closed for the day. The … [Read more...] about 4/20 is cannabis’ biggest day of the year — and this dispensary is closed