Day of the Month is a free Chrome add-on developed by Lee Hibberd that allows users to easily see the current day of the month as an icon in their browser's toolbar. With this add-on, there is no need to hover or click to view the date - it is always visible.

The main feature of Day of the Month is its simplicity. Instead of displaying the full date or requiring users to hover over the icon to see the day, it simply shows a clear number representing the current day of the month. For example, on June 19th, the icon will display '19' without any additional clutter.

Another useful feature of Day of the Month is the ability to change the color of the icon. By simply clicking on the icon, users can cycle through different color options to customize the appearance to their liking.

Overall, Day of the Month is a convenient and straightforward add-on for Chrome users who want a quick and easy way to see the current day of the month at a glance. With its intuitive design and customizable options, it enhances the browsing experience without any unnecessary frills.