Setting time on ESXi hosts through PowerCLI
So you go and build your new ESXi hosts, set NTP, but notice your time is still off. Did you know you can set your ESXi host time through PowerCLI?
After connecting to a host, you can set the time with the following commands. Always make sure you use UTC time when setting the time on your host as ESXi does not use timezones.
$t = Get-Date
$dst = Get-VMHost | %{ Get-View $_.ExtensionData.ConfigManager.DateTimeSystem }
$dst.UpdateDateTime((Get-Date($t.ToUniversalTime()) -format u))
And there you go. Now your ESXi hosts will have the same time as the machine you ran your script on, so just make sure that machine has the correct time.
And on why I have not blogged in a while, well that is another blog post.
Geaux Virtual 
## Setting time on many ESXi hosts through PowerCLI
Get-VMHost | Where-Object {
$t = Get-Date
$dst = $_ | %{ Get-View $_.ExtensionData.ConfigManager.DateTimeSystem }
$dst.UpdateDateTime((Get-Date($t.ToUniversalTime()) -format u))
}
Oscar Madrigal
April 2, 2012 at 10:16 pm