It was inevitable. The legalization of recreational marijuana, in addition to the expansion of medical marijuana, is creeping across the country. So, of course, big food brands were going to start celebrating weed holidays if they weren't already. Fast food joints were unintentionally celebrating already (or at least reaping the rewards) given the dearth of places for a quick bite at midnight on any given April 20.
On April 20, aka weed Christmas, you can get nugs after nugs because Burger King is bringing back its coveted spicy chicken nuggets for just one day.