April Fools day 1972 marked the opening day of Mar Y Sol, the 3 day festival/fiasco in Puerto Rico marrd by delays caused by productionproblems, controversy over it getting rescheduled on Holy Week and the fact that Black Sabbath, Fleetwood Mac as some other advertised acts did not appear. Sabbath was reportedly at a hotel a few miles from the fest site but was unable to get there because raods to the beachside setting were clogged and helicopters were not available to fly the band in. The promoter is said to have left the festival before it ended due to reports he was being sought by police.

On this date in 1976, Rush reseased 2112,a rebound release after a couple of disappointingly received albums and lukewarm fan reaction to the 1975/76 Caress of Steel tour.