On the 95LX in APPT, press (MENU) View Yearly-Repeat (F8) (Insert). Fill out the description, time and date of the appointment and press (F10) when you're finished.
On the 100LX in APPT, press (MENU) (F2) (Add) and fill out the description, time and date of the appointment. Press (F8) (Repeat) Yearly and you are presented with the following dialog box:
Yearly Repeating Appointments: Graphic
This box lets you set the Frequency of the appointment (e.g. every 1, 2, 3, or more years); the Duration of the repeating appointment (e.g. starts in 1994, ends in 1999); and Repeat Type (e.g. the appointment repeats on specific data like March 31, or by a position in the month like the last Thursday in March. When you've made your choices, press (F10) twice and your yearly repeating appointment is set.
Rich Hall Editor, The HP Palmtop Paper