TrayDay is a useful Windows software that displays the current date in the system tray and comes with a pop-up calendar. It also has the option to show week numbers and enables users to type dates in their preferred format with a double-click. The program includes Julian Day and Internet Time features.

Hovering over the icon will display the day of the week, while the Tooltip will show the Julian Day number and Internet Time in Swatch format. The pop-up menu that appears when you click the icon will display the date in up to ten different user-defined formats. You can choose to insert the date into your application or copy it to the clipboard, depending on your preference. One of the available formats is the ISO week date, using calendar week and day number notation, such as 2008-W15-2 for April 8, 2008.
TrayDay also has a calendar feature that can be displayed on your desktop. This calendar can show one or three months at a time and lets you choose a color scheme. You can set the calendar to be displayed on top of all other windows for quick reference. You can easily navigate through the months and years using your mouse, keyboard, or mouse wheel. You can also enter any date in whatever format you choose. If you need to view week numbers, you can simply press the W (or S) button on the calendar. TrayDay is compatible with Windows 7/8/10, making it a versatile and useful tool for Windows users.
Version 7.10: Windows 10 compatibility