On which weekday did August 20, 1940 occur?

Correct answer: Option D — Tuesday. Counting total odd days up to this date, or using a verified Gregorian calendar calculation, gives weekday index 1 where Monday is 0; therefore the day is Tuesday. Option A (Wednesday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option B (Thursday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option C (Saturday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error.