HP 17bII Owner's Manual page 152

3. Press
 .
This calculation always uses the actual calendar.
Example: Determining a Future Date. On February 9, 2003, you
purchase a 120-day option on a piece of land. Determine the expiration
date. Assume the date format is month/day/year.
Keys:
 
2.092003


120

152 11: Time, Appointments, and Date Arithmetic
File name : English-M02-1-040308(Print).doc
Display:
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Print data : 2004/3/9
Description:
Displays CALC menu.
Stores Feb. 9, 2003.
Stores number of days into
the future.
Calculates expiration date
(DATE2).