How does got get "local" time zone. I sometimes commit on systems set to utc. And I'm unsure how many people accurately set time zone in online tools like gith

How does got get "local" time zone. I sometimes commit on systems set to utc. And I'm unsure how many people accurately set time zone in online tools like github. And many devs esp famous ones travel a lot. Not to mention moving. All this to say, there's too many unknowns for me to trust this "study"