Yoko Ono's '13 Days Do it Yourself Dance Festival’ was, I believe, first 'held' in England in September 1967 - although 'held' is perhaps not quite the right word as it was a festival that took place in the imagination of participants who received a daily instructional postcard from Yoko for its duration. John Lennon was amongst those who took part. The first postcard said ‘Breathe at Midnight’, followed by 'Breathe at Dawn'. The last one read ‘Colour yourself. Wait for the spring to come. Let us know when it comes’.
The Festival has been repeated a number of times since, including via radio in Norway in 2005. When Yoko Ono performed in Liverpool last month, the Festival instructions were given out to people attending. Does anybody have the full set of instructions? They don't seem to be online.