The intention is that you customise the timezones to suit your needs and then save the corresponding URL / set it as a bookmark:
?tz= to the URL with comma-separated timezone names or UTC offsetsEurope/London, America/New_York, Asia/Tokyo0, +4, -5, -8 to display fixed UTC offsets (eg. UTC+4, UTC-5):CustomName after any timezone to override the default location nameExamples:
?tz=Europe/London,America/New_York,America/Los_Angeles?tz=Europe/London,America/Chicago,America/Los_Angeles:San Francisco?tz=Europe/London:UK,America/New_York:NYC,America/Los_Angeles:SF?tz=0,+4,-5,-8 (displays as UTC+0, UTC+4, UTC-5, UTC-8)?tz=Europe/London,+4:Dubai,-8:Pacific (mix named timezones and offsets)Common timezones: (all IANA timezones)