The fourth grade math problem of primary school on March 19, 2003 is Wednesday, so what day is August 1?

The fourth grade math problem of primary school on March 19, 2003 is Wednesday, so what day is August 1?

August 1, 2003 is Friday
Divide the sum of the remaining days in March, April, may, June, July and one day in August by 7. If the remainder is 1, it's Thursday. If it's 2, it's Friday. Cycle with this. (if there's no remainder, it's Wednesday!)
That is: (31-19 + 30 + 31 + 30 + 31 + 1) divided by 7 equals 19.2

There are four Wednesdays and five Tuesdays in September of a certain year. What day is September 1 of this year?

September has 30 days
30÷7=4…… two
Because there are five Tuesdays and four Wednesdays
So September 1 can't be a Tuesday,
It can only be Monday