HP -18C Owner's Manual page 119

To set the date:
1. Note the current date format. If the date contains slashes (for
example, 10/23/89), the current format is month/day/year. If
the date contains periods (for example, 23.10.1989), the current
format is day.month.year.
2. Key in the correct date as a seven- or eight-digit number, using
the current format. For example, April 3, 1987 would be
4.031987 (MM.DDYYYY) in month/day/year format or
3.041987 (DD.MMYYYY) in day.month.year format.
3. Press
1m1DII .
Table 8-2. SET Menu Keys
Menu Key ~ Description
Im1DII
Enters the number in the calculator line as the current date.
IIIB
Enters the number in the calculator line as the current time .
IIDi1iI In
12-hour format, switches the clock setting between AM
and PM.
&II Switches between month/day/year format and
day.month .year format.
IIi1III
Switches between 12-hour and 24-hour time formats.
IDIiI
Displays the keystrokes for keying in the time and date.
8: Time, Alarms, and Date Arithmetic 117