One Day is a new tab Chrome extension developed by jingyuan. This free extension allows users to mark their most memorable days and track how many days have passed or are left. With One Day, users can set their most memorable day in the options page, and every time they open a new tab, they will be able to see the number of days that have passed or are remaining.

The main purpose of One Day is to help users track important events and milestones in their lives. Whether it's counting the number of days you've been in a relationship, or how many days are left until the next New Year, One Day provides a simple and convenient way to keep track of time.

One Day is currently focused on providing basic functionality, but the developer is actively working on adding more features and improvements. If you have any ideas or suggestions, you can reach out to the developer via email.

Please note that One Day is only available for the Chrome browser and falls under the Browsers category, specifically the Add-ons & Tools subcategory. It is a free extension, making it accessible to all Chrome users.