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HP 12c Calculator - Date Format

Introduction
The calendar functions provided by the HP-12c, and , can handle dates from October 15, 1582 through November 25, 4046. The day of the week indicated by the DATE function may differ from that recorded in history for dates when the Julian calendar was in use. The Julian calendar was standard in England and its colonies until September 14,1752, when they switched to the Gregorian calendar. Other countries adopted the Gregorian calendar at various times.
Date format
For each of the calendar functions and for bond calculations ( and ) the calculator uses one of the two date formats. The date format interprets dates when they are keyed into the calculator.
Month-Day-Year
To set the date format to month-date-year, press, .
  1. Key in the one or two digits for the month.
  2. Press the decimal point key ().
  3. Key in the two digits of the day.
  4. Key in the four digits of the year.
Dates are displayed in the same format.
For example, to key in June 7, 2001:
Keystroke
Display
6.072001
 note:
With the date displayed in the format shown above, press to view the date in the selected number display format.
Day-Month-Year
To set the date format to day-month-year, press .
  1. Key in the one or two digits of the day.
  2. Press the decimal point key ().
  3. Key in the two digits for the month.
  4. Key in the four digits for the year.
Dates are displayed in the same format.
For example, to key in 7 June 2001:
Keystroke
Display
7.062001
 note:
With the date displayed in the format shown above, press to view the date in the selected number display format.
Information
When the date format is set to day-month-year, the ‘D.MY’ status indicator in the display is lit. If ‘D.MY’ is not lit, the date format is set to month-day-year (M.DY). The date format remains set until it is changed. It is not reset each time the calculator is turned on. However, if Continuous Memory is reset, the default setting is month-day-year.

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