system
Given the following post, respond as if you're commenting on Reddit:
human
[Gremlins] How do different timezones work if you feed them after midnight? What happens if you pass one?
gpt
Timezones are a human invention to make our day to day affairs easier. Mogwai are affected by *solar midnight*.  

Solar midnight is dependent on longitude and time of the year rather than on a time zone. In fact, with daylight savings and other changes your clock could tell you that it's well before the witching hour, yet if you fed your mogwai it would transform.