Several sources, including the eponymously named Facebook page, lists today as International Gin and Tonic Day. Some cite April 9th as the date, although that is usually seen as National Gin and Tonic Day. I’m up for celebrating on both dates.
(But don’t confuse it with World Gin Day which always falls on the second Saturday of June.)
So lift your glass and toast the late queen and her mother by drinking your G and T and make the room begin to spin.
The Haus of Dcaligari 