Popup Calendar is a very handy monthly calendar and scheduling tool that runs in your System Tray. Popup Calendar displays the day of the month as its icon in the System Tray. Left-clicking on the icon brings up a monthly calendar. You can easily move from month to month and year to year with the arrow buttons. Simply click the Day or Week tab to view your daily or weekly schedule, along with any notes you have written for that day. You can search your schedule for any text.With the click of a button you can view your daily appointments in Day-Timer fashion (from the start of your day to the end of it). This lets you easily see which hours of the day are free, and which are booked up.Popup Calendar will print professional-looking calendars for a day, week, or month. You can also copy your calendar to the Clipboard in HTML format to paste into your HTML editor.A handy feature of Popup Calendar is it's ability to copy dates to the Clipboard in a variety of formats.Popup Calendar also lets you perform math on dates. When given two dates, the program can find the number of days between them. Also, when given a date, the program can add or subtract a specified number of days and/or weeks to that date, to calculate a new date.You can also display handy information about a date. With a click, you can see days into the year, days left in the year, week number, computer date (for programmers), moon phase, and the age of the moon in days.