Timezone-data in this page can be used in Javascript Timezone Detection Library. The information here is generated on the fly using the following software:
PHP: 7.4.6
PHP timezonedb: 0.system


Below are implemented lists olson.timezones, olson.dst_start_dates, olson.ambiguity_list and version of get_date_offset() function that is compatible with this (olson.dst_start_dates) data.

Bugs: Firefox 3.6.13 in Mac OS X 10.6.5: Pacific/Kiritimati (+14:00) is is detected as Pacific/Honolulu (UTC-10:00). No workaround yet.

The advantage of this page is that when DST or UTC/GMT offset or names of the timezones changes, there is no need to manually check everything. Please note, that this code is generated automatically and there is no quarantee of 100% functioning. The detection quality in Mac OS X Safari was 100.00% (2010-01-18) and MAC OS X Firefox 98.8372093%

Timo Kähkönen, Finland