added new timezone options and date variable assignment

[itsavaren]

I am quite bad at javascript but I noodled and tried to implement the least impactful change that would respect the user's timezone in the timestamp. I'm american but I set it as en-GB as right now the variable is in UTC. feedback is welcome, or tell me to just make a feature request if its better for someone who knows what they're doing to handle it.

this is also my first ever contribution on github so I apologize if I did something wrong.