Timezone reference for scheduling

Some Wbiztool APIs take a timezone parameter that says how to read the date and time you send. This page explains which values work and lists every recommended timezone name.

Where timezones are used#

For a scheduled message, date (DD/MM/YYYY) and time (HH:MM, 24-hour) are read in this timezone. For a reminder, the cron expression runs in this timezone. In Google Sheets you choose the timezone from a list, so the value is always valid. In the template messages Timezone Column, an unknown name such as IST quietly uses the Default Timezone instead, so copy names from the list below.

Use IANA timezone names#

Always send a full IANA name in Region/City form, such as Asia/Kolkata, America/New_York or Europe/London. These names follow daylight saving time automatically and work on every API.

{ "timezone": "Asia/Kolkata" }

Write names exactly as they appear in the list below, including capital letters and underscores, such as America/Los_Angeles.

How each API handles other values#

Schedule message understands these abbreviations as a convenience:

Create reminder accepts only real timezone names and returns HTTP 400 with Invalid timezone for anything else, including IST, CST, PST and JST. EST and MST are accepted there, but as fixed offsets (UTC−5 and UTC−7) with no daylight saving time, unlike on Schedule message. Use America/New_York or America/Denver if you want daylight saving time.

Older alternative names, such as Asia/Calcutta, are also accepted, but prefer the names in the list below.

Common choices#

All timezone names#

These are the 433 common IANA timezone names, grouped by region. Canada/… and US/… are older aliases; prefer the America/… names.

Jump to: UTC and GMT · Africa · America · Antarctica · Arctic · Asia · Atlantic · Australia · Canada · Europe · Indian · Pacific · US

UTC and GMT (2)#

Africa (52)#

America (144)#

Antarctica (11)#

Arctic (1)#

Asia (82)#

Atlantic (10)#

Australia (11)#

Canada (6)#

Europe (58)#

Indian (11)#

Pacific (38)#

US (7)#