Calendar (Day of the Week) reasoning questions for competitive exams: rules, worked examples and practice

Calendar questions find the day of the week after a number of days, or for a date. Everything depends on the remainder when dividing by 7.

Published by MockBazaar · Editor: Arun Gupta · Updated 25 October 2026

Key rules and formulas

• Odd days = number of days mod 7.
• An ordinary year has 1 odd day; a leap year has 2.
• Today + n days: move forward by n mod 7 days.
• A century year is a leap year only if divisible by 400.

Common traps

• Counting today as day 1.
• Treating 1900 as a leap year.

Where Calendar (Day of the Week) is asked

• IBPS Clerk Prelims (Reasoning Ability)
• IBPS PO Prelims (Reasoning Ability)
• RRB Group D (General Intelligence & Reasoning)
• RRB NTPC CBT 1 (General Intelligence & Reasoning)
• SBI Clerk Prelims (Reasoning Ability)
• SBI PO Prelims (Reasoning Ability)
• SSC CGL Tier 1 (General Intelligence & Reasoning)
• SSC CGL Tier 2 (General Intelligence, Reasoning & General Intelligence)
• SSC CHSL Tier 1 (General Intelligence)

Worked examples

Related topics

• Seating Arrangement
• Alphabet Test
• Order and Ranking
• Classification (Odd One Out)
• Letter Series
• Number Series
• Clock (Angle Between Hands)
• Coding-Decoding

Practise Calendar (Day of the Week) in a timed mock