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HP -27S Owner's Manual page 189

Scientific

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Number
of
Days
Until a Special
Day
The
followi.g
equation
calculates
the number
of
days
between
today's date
and some other meaningful date
within
one year
from
today-for
example, Christmas.
The
calendar
in
the TIME application
must be set
properly.
Christmas
SHHTH=BT}HYS (
CBHTE
:8..rB+.
ff
l
XFP ( CBHTEX
l
EB +
IF(CtlHTE{=12, e5+, El
: B
I
1E-4) )
:
I
)
ffi,
For
other
special days, replace
L
2.25
with
the
special day,
expressed
in
MM.DD
format.
l.
To enter
the equation,
press
lfso-Lvtrl
,
then
m.
2.
Type
the equation and
press
t-Npuil.
3.Pressffitoverifytheequationanddisplaythemenuof
variables.
Example:
If
today is
April
20,
1988,
how many
days remain
until
Christmas?
Keys:
Display:
fffi
sHHTH=249.
BBBo
Description:
Calculates
number of
days
until
12/25/1988.
188
9: Additional
Examples

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