Day/Date Calculations - Casio CFX-9970G Manual

19-8 Day/Date Calculations

You can calculate the number of days between two dates, or you can determine
what date comes a specific number of days before or after another date.
Press 2 (DAYS) from the initial screen 2 to display the following input screen for
day/date calculation.
The format for inputting a date is: <month> . <day> <year>
Two digits must always be input for the day, so a leading zero must be input for
days 1 through 9.
P.7
In the set up screen, specify "365" for Date Mode and then press J.
d1 ................... date 1
d2 ................... date 2
D ..................... number of days
• {PRD} ... {calculates number of dates between two dates (d2 – d1)}
• {d1+D}/{d1–D} ... Calculates {future date/previous date}
• The set up screen can be used to specify either a 365-day or 360-day year
for financial calculations. Day/date calculations are also performed in
accordance with the current setting for number of days in the year, but the
following calculations cannot be performed when the 360-day year is set.
Attempting to do so causes an error.
(Date) + (Number of Days)
(Date) – (Number of Days)
• The allowable calculation range is January 1, 1901 to December 31, 2099.
Example January 2, 1990
b.acbjja
December 31, 2099
bc.dbcajj
Example Calculate the number of days from August 8, 1967 to July 15,
1970, using a 365-day year.
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