Victor Technology 1212-3A Series - Manual (Page 9)

DATE FORMAT: While displaying the date, depressing the %±
key allows changingthe date format mode from MM-DD-YYYY to
DD-MM-YYYY or YYYY-MM-DD. The default date format is
MM-DD-YYYY.
NOTE: If the power cord di disconnected from the AC
power source,the date/time memory will be lost and need-
set.
RESET:
Electromagnetic interference or electrostatic discharge may cause
the display to malfunction or the contents of the memory to be
lost or altered. Should this occur, use the tip of a ball point pen
(or similar sharp object) to press the [RESET] button on the bottom
of the calculator. After resetting, be sure to set the tax rate, time
and date again.
RESET RESET