You should always set it to UTC regardless. User interfaces can use local time zone. Even if you're a small mom-n-pop shop, good engineering is long term planni

You should always set it to UTC regardless. User interfaces can use local time zone. Even if you're a small mom-n-pop shop, good engineering is long term planning. Let's say you get some 3rd party managed appliance and you work with their techs to troubleshoot an issue, or host something in the cloud but all the stackdriver/cloudtrail is not on your local time. Just use UTC until you have a specific reason not to,even then do it at the user/setting level not a system wide default.