A client had requested to add a timezone dropdown to one of their forms.
I then realized, gravity forms didn't have a predefined timezone dropdown.
I scoured the internet and was unable to find an abridged text list of timezones.
I ended up going the hard route, removing option tags from around a timezone dropdown.
All in all it was a pain, and it would be quite handy for the future if gravity forms had this option.
Here is the list I ended up with:
(GMT -12:00) Eniwetok, Kwajalein
(GMT -11:00) Midway Island, Samoa
(GMT -10:00) Hawaii
(GMT -9:00) Alaska
(GMT -8:00) Pacific Time (US & Canada)
(GMT -7:00) Mountain Time (US & Canada)
(GMT -6:00) Central Time (US & Canada), Mexico City
(GMT -5:00) Eastern Time (US & Canada), Bogota, Lima
(GMT -4:00) Atlantic Time (Canada), Caracas, La Paz
(GMT -3:30) Newfoundland
(GMT -3:00) Brazil, Buenos Aires, Georgetown
(GMT -2:00) Mid-Atlantic
(GMT -1:00 hour) Azores, Cape Verde Islands
(GMT) Western Europe Time, London, Lisbon, Casablanca
(GMT +1:00 hour) Brussels, Copenhagen, Madrid, Paris
(GMT +2:00) Kaliningrad, South Africa
(GMT +3:00) Baghdad, Riyadh, Moscow, St. Petersburg
(GMT +3:30) Tehran
(GMT +4:00) Abu Dhabi, Muscat, Baku, Tbilisi
(GMT +4:30) Kabul
(GMT +5:00) Ekaterinburg, Islamabad, Karachi, Tashkent
(GMT +5:30) Bombay, Calcutta, Madras, New Delhi
(GMT +5:45) Kathmandu
(GMT +6:00) Almaty, Dhaka, Colombo
(GMT +7:00) Bangkok, Hanoi, Jakarta
(GMT +8:00) Beijing, Perth, Singapore, Hong Kong
(GMT +9:00) Tokyo, Seoul, Osaka, Sapporo, Yakutsk
(GMT +9:30) Adelaide, Darwin
(GMT +10:00) Eastern Australia, Guam, Vladivostok
(GMT +11:00) Magadan, Solomon Islands, New Caledonia
(GMT +12:00) Auckland, Wellington, Fiji, Kamchatka