The Special Day Option

  Use the Special Day option from the Mark submenu to mark
  a particular day as special.  Once the day is marked, it is
  displayed in a larger font (or in the highlight color on a color
  workstation).

  Additional topics:

  *   Marking Days and Weeks

  *   The Work Day Option

  *   The Non-Work Day Option

  *   The Default Option

  *   The Normal Day Option

  *   Customizing General Settings