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\/
Date
Arithmetic
\/
The CALC menu does date
arithmetic-finding
the number
of
days
v
between
two
dates,
or
determining the date a given number
of
days
.
in
the future or past. Date arithmetic
uses
one
of
three
calendars-
v
actual,
365-day,
or 350-day
(see
table 7-3). The CALC menu also de-
v
termines the day
of
the week
for
any
date.
v
To display the CALC menu, press
llTrrvrel, then
X.
v
v
v
\-,
v
\,/
\,,
v
\./
\-,
\-,
\./
v
\./
\-,
Table 7-3. The GALC
tenu for
Date Arithmetic
tenu
Key
Description
'
'
*
Stores
or
calculates
a
date
using
the current date
format-
month/day lyear (MM.DDYYYY)
or
day.month
.year
(DD.MMYYYY); also displays the day
of
the week.
lf
you omit
YYYY
the calculator uses
the
current
year.
Stores
or
calculates
the
number
of
days between
DATE1 and
DATE2 using
the
actual
calendar,
which
recognizes
leap
years.
Calculates
the
number
of
days between
DATE1
and
DATE2
using the 360-day
calendar,
which uses 12, 30-day
months.
Galculates
the
number
of
days between
DATE1
and
DATE2,
using
the
365-day
calendar,
which ignores leap
years.
Displays
the current
date.
Determining
the
Day
of
the
Week
for
Any
Date
To
find the duy of the
week
for any
date,
key
in
the date and
press
or.
\-/
\-,
!.\
7=
Time, Appointments, and Date
Arithmetic
145
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