Help with string to date conversion

I’m working on a simple script to read a log file, convert the latest reboot item flagged in said log file and convert it to a date object so I can compare it to another date object.

I’ve spent hours trying to troubleshoot this and just kept running into various roadblocks. The inherit [datetime] functionality doesn’t appear to be able to read my date string.

Code is attached, any input would be greatly appreciated.

Select-String <path to log file> -pattern <text to find> | Select-Object LineNumber, Line -Last 1 $GetLatestReboot = Get-Content $env:TemptextfileIdumpedOutputTo $LatestReboot = $GetLatestReboot | Select-String -Pattern '[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9].[0-9][0-9]:[0-9][0-9]:[0-9][0-9]' | Foreach-Object {$_.Matches} | Select-Object Value $LatestReboot = [datetime]$LatestReboot