Package datefudge

Fake the system date

http://packages.qa.debian.org/d/datefudge.html

This program (and preload library) fakes the system date so that
programs think the wall clock is ... different. The faking is not
complete; time-stamp on files are not affected in any way. This
package is useful if you want to test the date handling of your
programs without changing the system clock.

General Commands (Section 1)
datefudge
datefudge is a small utility that pretends that the system time is different by pre-loading a small library which modifies the time(2), gettimeofday(2) and...