Adds a function to display a holiday on the Datebook. The data of a holiday is created by MakeSpot. This software added the following function to "Datebook(*)" which is the software for PALM. A color is attached on a holiday and it is displayed on it. "Holiday data" is required in order to attach and display a color on a holiday. (*) It is the same function as "Datebook" of attachment in PALM of Palm Computing. The Expanded functions of the "Datebook" currently sold by other makers are not included.