Casio FX-9750G PLUS User's Manual & Technical Reference page 378

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Day/Date Calculations
Perform the following key operations from the input screen.
Perform the following key operations from the input screen.
Perform the following key operations from the input screen.
350
i.aibjghw
(d1 = August 8, 1967)
h.bfbjhaw
(d2 = July 15,1970)
1(PRD)
Prd .................. number of days
Example Determine the date that is 1,000 days after June 1, 1997.
Note that the attempting to perform the following calculation while
the 360-day year is in effect causes an error.
g.abbjjhw
(d1 = June 1, 1997)
c(d2 = Any date)
baaaw
2(d1+D)
d+D ................. future date calculation
Example To determine the date that is 1,000 days before January 1,
2001, using a 365-day year.
Note that the attempting to perform the following calculation while
the 360-day year is in effect causes an error.
b.abcaabw
(d1 = January 1, 2001)
c(d2 = Any date)
baaaw
3(d1–D)
d–D ................. previous date calculation
February 26, 2000
April 7, 1998