What day of the week was 29th February 2016 (Leap Day)?

medium Q6 of 15

Reasoning Ability - Calendar Problems

AMonday

BTuesday

CWednesday

DThursday

Step-by-Step Solution

Step 1: Treat February as month 14 of previous year
For Zeller’s Rule, January and February are treated as months 13 and 14 of the previous year. Hence, q = 29, m = 14, year = 2015.
Step 2: Compute K and J
K = 2015 % 100 = 15, J = floor(2015 / 100) = 20.
Step 3: Evaluate components
floor(13*(14+1)/5) = floor(195/5) = 39;
floor(K/4)=3;
floor(J/4)=5;
5*J = 100.
Total = h = (29 + 39 + 15 + 3 + 5 + 100) = 191 → 191 mod 7 = 2.
Step 4: Map result to weekday
Zeller mapping: 0 = Saturday, 1 = Sunday, 2 = Monday, 3 = Tuesday, 4 = Wednesday, 5 = Thursday, 6 = Friday. So h = 2 → Monday.
Final Answer:
Monday → Option A
Quick Check:
Calendar references confirm 29-Feb-2016 = Monday ✅

Quick Trick: For January and February, use the previous year in calculations and treat months as 13 and 14.

Common Mistakes:

MISTAKES

Using 2016 instead of 2015 for K and J, or forgetting to apply the month shift for February.

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