Time track across different time zones

We have offices across three diffrent time zones, but hte browser version of Bolt does not correct fo this. It would be best to use a scripted button that uses system or server time, rather than assuming the time-zone at our HQ office. Right now, the browser uses a drop-down input rather than a button. While the button is preferred, adding a fourth dropdown for time-zone: (PST, CMST, EST) would suffice.