User`s guide

Calendar Formats and Date Calculations
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9 Calendar Formats and Date Calculations
Calendar Format
The calendar options for bonds and date calculations are Actual (ACT) and 360. Press
]Å to toggle between these options. The default setting, Actual, is based on a 365-
day calendar. The alternate setting, 360, is based on a 360-day calendar. It is important to
note date and bond calculations return different values for each of these settings, so verify the
calendar mode is appropriate for your problem before you begin.
Table 9-1 Date and Calendar Keys
Date Format
The valid range of dates for the calendar functions of the HP 10bII+ is October 15, 1582
through December 31, 9999. For the date, the number of days between two dates, and bond
calculations, dates may be entered and displayed either in month-day-year (M.DY) or day-
month-year (D.MY) formats. In addition to a different display mode for the date and date
calculations, these functions also return different values based on the 365-day (ACT) and 360-
day (360) calendars.
Press
]È to toggle between the formats. The default setting is day-month-year
(dd.mmyyyy).
Press
]Å to toggle between the 360-and 365-day (actual) calendars.
To specify the number of displayed decimal places:
1. P r e s s \5.
Keys Description
]È
Enters dates in DD.MMYYYY or MM.DDYYYY formats. D.MY is the default.
Numbers at the far right of a calculated date indicate days of the week. 1
is for Monday; 7 is for Sunday.
]Å
Toggles between 360-and 365-day (Actual) calendars.
\Ç
Calculates the date and day, past or future, that is a given number of days
from a given date. Note the returned result is
always calculated on the
365-day calendar (Actual), regardless of the calendar setting.
\Ä
Calculates the number of days between two dates. Based on your current
setting, returned result is calculated on either the 365-day (Actual) or the
360-day calendar.