2.Key in the second date and press .

3.Press , , or to calculate the number of days using that calendar.

Example: Calculating the Number of Days between Two Dates. Find the number of days between April 20, 2003 and August 2, 2040, using both the actual calendar and the 365-day calendar. Assume the date format is month/day/year.

Keys:

Display:

Description:

 

 

 

 

Displays CALC menu.

 

 

4.202003

 

Stores Apr. 20, 2003

 

 

as first date and

 



 

 

 

 

 

displays its day of the

 

 

 

 

 

week.

8.022040

 

Stores Aug. 2, 2040 as

 

 

second date.

 



 

 

 

 

 

 

 

 

Calculates actual

 

 

 

 

 

 



number of intervening

 

 

 

 

 

days.

  Calculates number of intervening days by a 365-day calendar.

Calculating Past or Future Dates

To calculate a date a specified number of days from another date:

1.Key in the known date (for today’s date, use ) and press

.

2.Key in the number of days. This number should be negative if the unknown date precedes the known date. Press .

11: Time, Appointments, and Date Arithmetic 151

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