How to compare time between two variables - powershell

Question

I am trying to compare the time difference between two variables. $dt is a string pulled from the text of a log file. $curtime is pulled from the current date and time.
If I output $dt, it displays correctly the date and time from the log files. If I output $curtime, it displays correctly the date and time from the workstation.
But when I try and run New-TimeSpan and output the difference, my response is always "02:24:12".
Here is the code I am using:
New-TimeSpan $dt $curtime | Set-Variable -Name $TimeDiff
if ($TimeDiff.Seconds -lt 0) }
$Hrs = ($TimeDiff.Hours) + 23
$Mins = ($TimeDiff.Minutes) + 59
$Secs = ($TimeDiff.Seconds) + 59 }
else {
$Hrs = $TimeDiff.Hours
$Mins = $TimeDiff.Minutes
$Secs = $TimeDiff.Seconds }
$Difference = '{0:00}:{1:00}:{2:00}' -f $Hrs,$Mins,$Secs
$Difference

Answer 1

Unless he datetime from the logs are from a very narrow timespan,
it makes IMO no sense to manipulate by adding 23:59:59.
Better take the integer part from .TotalHours
Here returning hours > 24/99
$dt = "05/26/19 08:23:37"
$LogDT = [datetime]::parseexact($dt,"MM/dd/yy HH:mm:ss",[cultureInfo]::Invariantculture)
$TimeDiff = [datetime]::now - $LogDT
$Difference = '{0:00}:{1:00}:{2:00}' -f ([math]::floor($Timediff.TotalHours)),
$Timediff.Minutes,$Timediff.Seconds
Sample output:
> $Difference
111:16:17