The integrity of system timestamps are extremely important for fraud detection by keeping track of precisely when financial transactions and other changes occur. By resetting the clock it is possible to misrespresentmisrepresent sequences of events.{{cn|date=Apr 27, 2025}} With that in mind both [[Berkeley Software Distribution| BSD]] and [[GNU]] based Unix systems log both the before and after times when the clock is reset, including by the date command, in the [[utmp]] file.<ref>{{cite web| author=<!-- not stated --> | url=https://www.unix.com/man_page/bsd/5/utmp/https://www.unix.com/man_page/bsd/5/utmp/ | title=bsd man page for utmp| publisher=Unix Linux Community| website=community.unix.com | date=Nov 27, 1996 | dateaccess-accesseddate=April 27, 2025 }}</ref><ref> {{cite web || author=<!-- not stated --> | editor-last=Kerrisk| editor-first=Michael | date= |title= |url=https://man7.org/linux/man-pages/man5/utmp.5.html |website=man7.org | title=utmp(5) — Linux manual page |date=2024-09-911|___location= |publisher= |access-date=April 27, 2025}}</ref>
