INSTRUCTIONS: To convert from TJD to year, month, and day, enter a TJD in the text input box labeled "Truncated Julian Day". Use the "Enter" key on your keyboard to initiate the conversion, or select the "Update YMD" button. The values of year, month, and day will be updated to correspond to the TJD you entered. To convert from year, month, and day, enter the values in the three text input boxes labeled "Year", "Month", and "Day". You can use the mouse or the "Tab" key to navigate among the boxes. Use the "Enter" key or select the "Update TJD" button to initiate the conversion and update the value of the Truncated Julian Day.