If 11th January 2024 is a Thursday, what was the day on 11th January 2023?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Wednesday
The weekday repeats every 7 days, so only the odd days, the days left over after whole weeks, move it. Going back in time moves the weekday back by the same number.
From 11 January 2023 to 11 January 2024: 365 days, because 29 February 2024 comes after 11 January 2024
\(365=52\times7+1\): 1 odd day
11 January 2023 is one weekday before Thursday: Wednesday
Tip: A leap year adds its second odd day only when 29 February falls inside the period counted.