If you want to set a timezone for appointments when importing them via the Appointment Import tool, add a column named timezone to your .csv file.

If a valid timezone is specified for a given appointment row, it will override the default timezone for that appointment. If no timezone or an invalid timezone is specified, the appointment time will be interpreted to be in the calendar or business timezone (as it is by default currently).

The timezone for appointments is shown both on the client's confirmation page and when viewing the appointment in the Admin UI.

The valid timezone options are:

Pacific/Honolulu
America/Anchorage
America/Los_Angeles
America/Denver
America/Phoenix
America/Chicago
America/New_York
Pacific/Apia
Pacific/Midway
Pacific/Niue
Pacific/Pago_Pago
Pacific/Fakaofo
Pacific/Johnston
Pacific/Rarotonga
Pacific/Tahiti
Pacific/Marquesas
Pacific/Gambier
America/Tijuana
America/Vancouver
Pacific/Pitcairn
America/Dawson_Creek
America/Edmonton
America/Hermosillo
America/Mazatlan
America/Whitehorse
America/Yellowknife
America/Belize
America/Costa_Rica
America/El_Salvador
America/Guatemala
America/Managua
America/Mexico_City
America/Regina
America/Tegucigalpa
America/Winnipeg
Pacific/Easter
Pacific/Galapagos
America/Bogota
America/Cayman
America/Grand_Turk
America/Guayaquil
America/Havana
America/Iqaluit
America/Jamaica
America/Lima
America/Cancun
America/Nassau
America/Panama
America/Port-au-Prince
America/Toronto
America/Caracas
America/Anguilla
America/Antigua
America/Aruba
America/Asuncion
America/Barbados
America/Boa_Vista
America/Campo_Grande
America/Cuiaba
America/Curacao
America/Dominica
America/Grenada
America/Guadeloupe
America/Guyana
America/Halifax
America/La_Paz
America/Manaus
America/Martinique
America/Montserrat
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Rio_Branco
America/Santiago
America/Santo_Domingo
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Thule
America/Tortola
Antarctica/Palmer
Atlantic/Bermuda
Atlantic/Stanley
America/St_Johns
America/Araguaina
America/Argentina/Buenos_Aires
America/Bahia
America/Belem
America/Cayenne
America/Fortaleza
America/Godthab
America/Maceio
America/Miquelon
America/Montevideo
America/Paramaribo
America/Recife
America/Sao_Paulo
Antarctica/Rothera
America/Noronha
Atlantic/South_Georgia
America/Scoresbysund
Atlantic/Azores
Atlantic/Cape_Verde
Africa/Abidjan
Africa/Accra
Africa/Bamako
Africa/Banjul
Africa/Bissau
Africa/Casablanca
Africa/Conakry
Africa/Dakar
Africa/El_Aaiun
Africa/Freetown
Africa/Lome
Africa/Monrovia
Africa/Nouakchott
Africa/Ouagadougou
Africa/Sao_Tome
America/Danmarkshavn
Atlantic/Canary
Atlantic/Faroe
Atlantic/Reykjavik
Atlantic/St_Helena
Etc/GMT
Europe/Dublin
Europe/Lisbon
Europe/London
Africa/Algiers
Africa/Bangui
Africa/Brazzaville
Africa/Ceuta
Africa/Douala
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Luanda
Africa/Malabo
Africa/Ndjamena
Africa/Niamey
Africa/Porto-Novo
Africa/Tunis
Africa/Windhoek
Europe/Amsterdam
Europe/Andorra
Europe/Belgrade
Europe/Berlin
Europe/Brussels
Europe/Budapest
Europe/Copenhagen
Europe/Gibraltar
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Monaco
Europe/Oslo
Europe/Paris
Europe/Prague
Europe/Rome
Europe/Stockholm
Europe/Tirane
Europe/Vaduz
Europe/Vienna
Europe/Warsaw
Europe/Zurich
Africa/Blantyre
Africa/Bujumbura
Africa/Cairo
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Kigali
Africa/Lubumbashi
Africa/Lusaka
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Tripoli
Asia/Amman
Asia/Beirut
Asia/Damascus
Asia/Gaza
Asia/Jerusalem
Asia/Nicosia
Europe/Athens
Europe/Bucharest
Europe/Chisinau
Europe/Helsinki
Europe/Istanbul
Europe/Kaliningrad
Europe/Kiev
Europe/Minsk
Europe/Riga
Europe/Sofia
Europe/Tallinn
Europe/Vilnius
Africa/Addis_Ababa
Africa/Asmara
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Kampala
Africa/Khartoum
Africa/Mogadishu
Africa/Nairobi
Antarctica/Syowa
Asia/Aden
Asia/Baghdad
Asia/Bahrain
Asia/Kuwait
Asia/Qatar
Asia/Riyadh
Europe/Moscow
Indian/Antananarivo
Indian/Comoro
Indian/Mayotte
Asia/Tehran
Asia/Baku
Asia/Dubai
Asia/Muscat
Asia/Tbilisi
Asia/Yerevan
Europe/Samara
Indian/Mahe
Indian/Mauritius
Indian/Reunion
Asia/Kabul
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Dushanbe
Asia/Karachi
Asia/Tashkent
Asia/Yekaterinburg
Indian/Kerguelen
Indian/Maldives
Asia/Kolkata
Asia/Colombo
Asia/Kathmandu
Antarctica/Mawson
Antarctica/Vostok
Asia/Almaty
Asia/Bishkek
Asia/Dhaka
Asia/Omsk
Asia/Thimphu
Indian/Chagos
Asia/Rangoon
Indian/Cocos
Antarctica/Davis
Asia/Bangkok
Asia/Hovd
Asia/Jakarta
Asia/Krasnoyarsk
Asia/Phnom_Penh
Asia/Ho_Chi_Minh
Asia/Vientiane
Indian/Christmas
Antarctica/Casey
Asia/Brunei
Asia/Choibalsan
Asia/Hong_Kong
Asia/Irkutsk
Asia/Kuala_Lumpur
Asia/Macau
Asia/Makassar
Asia/Manila
Asia/Shanghai
Asia/Singapore
Asia/Taipei
Asia/Ulaanbaatar
Australia/Perth
Asia/Dili
Asia/Jayapura
Asia/Pyongyang
Asia/Seoul
Asia/Tokyo
Asia/Yakutsk
Pacific/Palau
Australia/Adelaide
Australia/Darwin
Antarctica/DumontDUrville
Asia/Vladivostok
Australia/Brisbane
Australia/Hobart
Australia/Sydney
Australia/Melbourne
Pacific/Guam
Pacific/Port_Moresby
Pacific/Saipan
Pacific/Chuuk
Asia/Magadan
Pacific/Efate
Pacific/Guadalcanal
Pacific/Kosrae
Pacific/Noumea
Pacific/Pohnpei
Pacific/Norfolk
Asia/Kamchatka
Pacific/Auckland
Pacific/Fiji
Pacific/Funafuti
Pacific/Kwajalein
Pacific/Majuro
Pacific/Nauru
Pacific/Tarawa
Pacific/Wake
Pacific/Wallis
Pacific/Enderbury
Pacific/Tongatapu
Pacific/Kiritimati