Giving names to DHCP devices and a question about UTC timestamps in log files

[road hazard]

In Untangle, there was a spot you could go to and manually enter names for devices on your network. Looking at my DHCP leases: (see attached picture) ..... there's lots of blank hostnames.

Is it possible (without using the static DHCP feature), to go in and add some text to each of those devices that are missing the hostname so I know what they are?

UTC log file question..... in some of the logs, they have a UTC timestamp. Is there any way to remove UTC stamps and have -EVERY- log file use my current time zone's timestamp?