We eat, sleep, and breathe holidays, so you don't have to.

Our Mission

Holiday API is on a mission to rid the world of databases and spreadsheets full of stale holiday data. Our algorithmic approach to this problem allow us to provide accurate, up-to-date holiday information that can be added to your application in minutes. On the fly calculations allow us to offer a wide range of both historical and future data. We're obsessive about holidays and observances, the different calendars used around the world, and the math that makes it all work.

We eat, sleep, and breathe holidays, so you don't have to.

Founded in 2013, Holiday API has grown to support 250 countries and 3,680 states & provinces in 109 different languages.

Meet the Team

Josh Sherman

Founder / Engineer

Josh Sherman is a full stack developer with over 20 years experience in technology, ranging from support to CTO. He has a passion for architecting scalable solutions with simple interfaces that help improve the quality of life of his fellow developers.

Favorite Holiday: Thanksgiving ๐Ÿฆƒ

Jenny Sherman

Content Creator

Jenny Sherman is an avid reader, blogger and homeschool parent. With a background in education, a love of history, and a passion for learning about different cultures and its people, Jenny does extensive research and weaves an informative description of each countryโ€™s story.

Favorite Holiday: Halloween ๐ŸŽƒ

Justin Davis


Justin Davis is a seasoned user experience designer and developer, with over 20 years experience designing and building technology products, with companies like Google, Coke Zero and MetLife. Heโ€™s also the founder of ReviewCycle, a tool to help make review of creative assets easier and more productive.

Favorite Holiday: Christmas ๐ŸŽ„

Collin Brewer


Collin Brewer is a software creator and entrepreneur of 20 years. He believes that first and foremost, work should be fulfilling, and supportive to a rich life. After selling his software business, Collin now focuses his efforts on helping people work smarter, instead of harder.

Favorite Holiday: Christmas ๐ŸŽ…