by John P. Pratt
Updated 4 Nov 2016
This is a calendar spreadsheet. Enter event names in the left-hand column (optional), overwriting the first examples shown, if desired. Enter the date on our modern Gregorian calendar in the next column and press Enter. That date will automatically be displayed on the other calendars in the other columns. At any time, if you wish to change what version of the calendar you are using (such as changing from the Pratt to the GMT version of the Mayan calendar), simply change the version number at the column head and the entire column will be recalculated accordingly. You may also change the calendar to other choices, and the format of the date. If the format for other calendars shows a year, you can usually enter the date in that column and it will change all calendars to that date. You may also use the Add button to have up to a total of 16 calendars. If you wish to enter dates to quarter-day accuracy, use the "Show Accuracy" choice on the Gregorian calendar and after the date enter "am" or "pm" for morning or afternoon times, or am* for before sunrise or pm* for after sunset (when the *'s are shining). If not specified, the default time of day is afternoon. Days which are holy are shown in blue and those which are most holy in red. If you don't see the sheet at all, make sure Java is turned on and allowed to run this applet. It probably won't run on smart phones because they don't run Java.