If it was Saturday on March 12, 2022, then what was the day on March 12, 2017?

Number of odd days in a non-leap year is 1 and number of odd days in a leap year are 2. There are 4 non-leap years (2018, 2019, 2021 and 2022) From March 12, 2017, to March 12, 2022, and 1 leap year 2020. So, total number of odd days will be: From March 12, 2017, to March 11, 2018: 1 From March 12, 2018, to March 11, 2019: 1 From March 12, 2019, to March 11, 2020: 2 From March 12, 2020, to March 11, 2021: 1 From March 12, 2021, to March 11, 2022: 1 So, total number of odd days are 6. And on March 12, 2022,it was Saturday So, on March 12, 2017, it was Sunday (As Sunday +6 odd days = Saturday).