What format is the timeCreated field in asset meta files in?

Meta files in Unity have a field timeCreated followed by a many digit number. What format is this in? What time does this represent (ex: last modified, when the file was created, etc.)? Does this correspond to any of the time stamps set by the OS on the asset’s file? Is there anyway to access the field from the meta file for asset management purposes?

Thanks.

It’s Unix Time: The number of seconds since the Unix Epoch, which is midnight, Jan 1, 1970. It’s a pretty standard way to represent time, so probably they just wanted an additional way to tell assets apart.