When Can I Reuse This Calendar?

I am pretty sure that you ask this question at least once in your life: “When can I reuse this calendar?” If you have an unused calendar from past years, don’t worry. You can reuse them for years to come. Yes, since the annual calendar cycle is pretty predictable and the days of the week repeat every few years, all of the days of the week match up, including possible leap days. And you don’t need to do any calculations.

WhenCanIReuseThisCalendar.com will help you with this. For example, if you have a calendar for 2011, 2005, or 1994, you can use it this year. Or, if you have a calendar for 2022, it is reusable in 2033, 2039, 2050, 2061, 2067, 2078, 2089, 2095, 2101, 2107, and 2118.

Ali Kaya


Ali Kaya

This is Ali. Bespectacled and mustachioed father, math blogger, and soccer player. I also do consult for global math and science startups.