why is 30 the go-to length for shorter work weeks? I chose 32 because it's 4/5 of 40. I work four days a week instead of five and im not worried about how many

why is 30 the go-to length for shorter work weeks? I chose 32 because it's 4/5 of 40. I work four days a week instead of five and im not worried about how many hours I put in. I've been part time for a year and a half. I realized I was earning more money than I needed and that I wanted more time to enjoy life. My employer, a FAANG company, offered a proportional cut to salary and stock grants.