php - Half hour time zones missing

Question

In PHP I am using DateTimeZone::listIdentifiers() to get a list of time zones for user selection. This seems to be working fine, but missing from this list are the half hour time zones.

Notably Newfoundland, Iran and India. Anyone know how to get them back, why they are missing? The PHP docs show them as "don't use these timezones" but they are still used in the world and they don't seem to be listed in the "valid" list anywhere here.

Any ideas?

Answer 1

For example:

Newfoundland time zone identifier is America/St_Johns

[1] http://php.net/manual/en/timezones.america.php

[2] https://en.wikipedia.org/wiki/List_of_tz_database_time_zones