Quiz: 120 Day Calculator

Creators

Joanna Śmietańska, PhD

Joanna ŚmietańskaPhD, AGH University of Krakow, Cracow, Poland

Website

Research Gate

Joanna Śmietanska-Nowak is an academic teacher at AGH University of Science and Technology in Kraków. Her research interests focus on protein crystallography and modulated systems, though she has previously worked on photocatalysis and energy storage systems, including supercapacitors and Li-ion batteries. She has participated in and led several research projects funded by the Polish National Science Centre. While working at Omni, she primarily developed calculators related to physics, chemistry, and mathematics. In her free time, she enjoys playing board games, cooking, hiking, and brewing beer. See full profile

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Reviewers

Steven Wooding

Steven Wooding is a physicist by training with a degree from the University of Surrey specializing in nuclear physics. He loves data analysis and computer programming. He has worked on exciting projects such as environmentally aware radar, using genetic algorithms to tune radar, and building the UK vaccine queue calculator. Steve is now the Editorial Quality Assurance Coordinator here at Omni Calculator, making sure every calculator meets the standards our users expect. In his spare time, he enjoys cycling, photography, wildlife watching, and long walks. See full profile

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Think you know how date counting really works?

We created this quiz as a companion to our 120 day calculator, but it works just as well on its own — helping you test your general understanding of counting days forward and backward, across months and leap years.

If you’d like more practice or concrete examples, we also have a whole collection of date and day-counting tools:

Quiz: 120 Day Calculator

120-day calculation quiz

Results