Date Ninja is a collection of simple, fast, and reliable date-based tools designed to work instantly in your browser.
The goal of Date Ninja is to remove friction from everyday date-related tasks — such as calculating date differences, business days, deadlines, tax years, and work-related dates. All tools are free to use, require no signup, and are built to be accurate, lightweight, and distraction-free.
Date Ninja focuses on doing one thing well per tool. There are no accounts, no unnecessary features, and no hidden limitations.
The site is continuously improved based on real usage and practical needs.
If you have any questions, get in touch.