0 12 August, the start of the grouse shooting season in Britain
1 12th August, the first day of the season in the UK when people are allowed to shoot grouse (= a bird hunted for sport and food):
The grouse season opens on the "glorious twelfth" of this month.
Efforts by animal rights activists to disrupt local shoots began on the Glorious Twelfth.
There is no Glorious Twelfth marking the start of the hunting season for hogs.
The Olympic final coincides with that famous date in Britain's shooting calendar, the Glorious Twelfth.
