time shifting
<programming> A technique used to work around problems due to
the {Year 2000} and the "millennium bug". Time shifting
involves translating date fields in a database back by a fixed
number of years to avoid year 2000 problems with the {database
management system}.
Typically dates are shifted back 28 years so that the occurrence
of leap years and days of the week match with the actual year.
(2003-08-15)