If, 18th December, 2025 falls on a Thursday, which of the following dates of December, 2034 shall be a Thursday too?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 21st December, 2034
The weekday repeats every 7 days, so only the odd days move it forward: a year of 365 days adds 1 odd day, and a period that contains a 29 February adds 2.
From 18 December 2025 to 18 December 2034 there are 9 years
Two of them contain a 29 February: 29 February 2028 and 29 February 2032
Odd days \(=9+2=11\), that is \(11-7=4\)
18 December 2034 is Thursday + 4 = Monday
The next Thursday is 3 days later: 21 December 2034