Acer Altos 1100 Series User Manual page 89

The real-time clock keeps the system date and time. After setting the date and
time, you do not need to enter them every time you turn on the system. As long
as the internal battery remains good (approximately seven years) and connected,
the clock continues to keep the date and time accurately even when the power is
off.
The following screen appears if you select Date and Time from the main menu.
Date .............................. [xxx xx xx, 199x]
Time .............................. [xx:xx:xx]
= Move Highlight Bar,
Highlight the items on the Date parameter and press
following the weekday-month-day-year format.
Valid values for weekday, month, day, and year are:
Weekday
Month
Day
Date and Time
Sun, Mon, Tue, Wed, Thu, Fri, Sat
to
1 12
to
1 31
= Change Setting, F1 = Help
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or to set the date