[timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($UnixTime))
PS C:\> $UnixTime = '1553353149' >> [timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($UnixTime)) Saturday, March 23, 2019 9:59:09 AM
[timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($UnixTime))
ExamplePS C:\> $UnixTime = '1553353149' >> [timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($UnixTime)) Saturday, March 23, 2019 9:59:09 AM