For those who are looking for a better calendar than the small calendar with clock on your desktop, RebCalendar is the right choice! It is an equally simple and small tool but more powerful with better functions. You can pop up this calendar from the system tray with a key combination whenever you want to use it. Just press the Win+C keys or click the icon for the program to start using it. It contains templates for holidays list and has predefined holidays for US and Madrid. You can add your own list in the template file. It is possible to add events to the dates just by clicking them. A very flexible calendar designed for windows!