KurilooStudy·Practice·Succeed
Aptitude Topics

Recurring Events

Events occurring on the same date each year shift their weekday based on whether the intervening year was ordinary or a leap year.

Fundamental Principles

Annual Shift

The weekday shift for an event recurring on the same date: +1 day for ordinary years, +2 days if the year spans a leap February 29th.

Essential Formulation Tips

  • Check if February 29th falls within the interval between the two dates.
  • If the date is before Feb 29, the leap year only affects the count if that year itself is a leap year.

Shortcut Execution Techniques

  • If an event falls on a leap day (Feb 29), it only recurs on the same date every 4 years.

Contextual Inquiries (FAQs)

Q: Does the weekday shift every year?

A: Yes, by 1 day usually, or 2 days if a leap year is involved.