https://www.cnbc.com/2020/09/10/jim-cramer-on-september-it-is-good-to-have-some-cash.html
Oil prices first went negative on Monday, April 20, 2020
Biggest Oil Disaster In History Began On Tuesday, April 20, 2010
It is exactly 21 weeks times 7 days between Monday, 4/20/2020 and Monday, 9/14/2020
April 20 is day 110 during regular year and day 111 during leap year.
