QuickTip: How long since a file was last written to?
Here’s a quick way to find out. Pipe the file to the New-TimeSpan cmdlet.
PS > Get-ChildItem foo.txt | New-TimeSpan
Days : 319
Hours : 7
Minutes : 8
Seconds : 48
Milliseconds : 409
Ticks : 275873284097833
TotalDays : 319.29778252064
TotalHours : 7663.14678049536
TotalMinutes : 459788.806829722
TotalSeconds : 27587328.4097833
TotalMilliseconds : 27587328409.7833