HP -01 Owner's Manual page 91

HH : MM S S PM time.
HH : MM S S - Alarm set, AMtime.
Date Display Data
Display MM-DD-YY M = month
DD-MM-YY D = day
Y = year
MM-DD - Y Y. Twenty-first century.
THE REGISTERS
Time Register. The quartz crystal and electronic circuitry inside your HP-01 update the con-
tents of the time register every second in a 24-hour mode. So, if you enter or display the time
of day in the 12-hour mode, the HP-01 instantly converts the internal time to or from the 12-hour
mode. The largest allowable time of day is 23:59:59.
Operational Description 89