Carbon is an amazing date library that is included with Nova. One of it’s features is being able to convert ‘2017-03-09 08:01:00’ into a readable format of ‘2 Hours ago‘
By default Nova will convert the created_at, updated_at, and deleted_at columns to instances of Carbon. Allowing to use diffForHumans() call:
$post->created_at->diffForHumans()
This will output the time in a readable format like ‘2 hours ago’
For more information on Carbon visit http://carbon.nesbot.com/docs/#api-humandiff