HP 20B - Manual (Page 49)

Date Calculation
49
6 Date Calculation
Figure 1 The Menu Map for the Date Calculation Menu
The Date Calculation Menu
The Date Calculation menu is used to calculate the number of days between two dates, or a second date given a number of
days from an initial, or final date. To open the Date Calculation menu, press
:@
. Press
<
or
>
repeatedly to
scroll through the items shown in Figure 1. Before you enter dates, verify the date is set in the format required for your
problem. Date and calendar formats may be set in the Mode menu. For more information on setting the preferences in the
Mode Menu, see the section titled,
The Mode Menu: Setting Preferences in Chapter 1 .
To change the value of a displayed item, key in a number or a date and press
I
. Once you have entered all known
data, press
<
or
>
repeatedly to scroll to the unknown item and press
=
to calculate it.
Date Calculation Example
How many days remain in the 2010 fiscal year if today's date is June 4, 2010? Assume the fiscal year ends on October
31st, and you wish to calculate the actual number of days (Actual).
Table 6-1 Date Calculation Example
Key Display Description
:@ Opens the Date Calculation menu. Note: 2 in the right of
the display represents the day of the week. 2 represents
Tuesday.
6.04
2010
I Inputs the starting date in the selected format.