1. First, we need to calculate the number of days since a specific date in the past for which we know the day of the week. A common reference point is 1st January 1900, which was a Monday.
2. Count the number of days from 1st January 1900 to 11th May 1946. To do this, we can count the number of days in each year, considering leap years, and then add the number of days in the months leading up to May in 1946.
3. The total number of days from 1st January 1900 to 11th May 1946 is 16676.
4. Divide this number by 7 to determine how many complete weeks have passed. In this case, 16676 divided by 7 gives 2382 weeks with a remainder of 2 days.
5. The remainder of 2 days indicates that we need to count two more days from the end of the last complete week.
6. Starting from Monday (the day of the week for 1st January 1900), count two days forward. Monday + 2 days = Wednesday.
Therefore, 11th May 1946 was a Wednesday.