In 1993, NBC decided it wanted to extend the Saved by the Bell franchise with a new show, Saved by the Bell: The New Class. Also set at Bayside, the show would follow a new cast of characters as they navigate their high school years.
Lightning can occur between opposite charges within the thunderstorm cloud (intra-cloud lightning) or between opposite charges in the cloud and on the ground (cloud-to-ground lightning). Lightning is one of the oldest observed natural phenomena on earth.
So on average, the combination of any 3 days occuring 5 times in a calendar month will happen once a year. In any given year, there are only 6 such combinations of days. This is because 2 months with 31 days start on the same weekday.