HP -01 Owner's Manual page 89

Date Data. A slash informs the HP-01 that the keyboard entry is a date. Dates are entered as
MM/DD/YY or DD/MM/YY, where MM stands for month, DD for day, and YY for the last two
digits of the year. If you key in more than two digits before the slash, the HP-01 interprets the
entry as a decimal number or a time interval and ignores the slash.
You can enter any date from January 1, 1900 to December 31, 2099. When you press ..,the
date entry is loaded into a calendarregister.
DATA ENTRY AND DISPLAY SUMMARY
Digit Position
1/2/3/4/5/6/7/8/9
Decimal Entry Data
Minimum Non-Zero 1
Maximum 9 9 9
Scientific Notation Display Data
Minimum 1. - 99
Maximum 9 . 9 99 9 9
Operational Description 87