TrayDay is just a calendar which sits in your system tray. A tool to provide you a handy calendar that can pop up when you want. The best choice for those looking for a simple calendar with no complexity. Choose to show the calendar on top every time on the desktop. Select from the date formats available. Use your mouse or keyboard for navigating across the dates and months. You have the option to set the first day of the week. Calculate number of days between two specified dates. Choose the colors for particular days of the week. What more would you need for a calendar?