fast-timezone
Timezone lookup service.
About
This is modified version of Evan Siroky's amazing geo-tz, but optimized for speed without any compromises.
The approach here is brutally simple: Load everything into memory. Doing so, fast-timezone will typically consume around 900MB memory extra. Don't even think about using it if you can't spare at least 1GB of extra memory per process.
Installation
npm i fast-timezone
Usage
const getTimezone = require('fast-timezone'); // It is a good idea to wait until the data is loaded. If any lookups are// performed before that, an error will be thrown.await getTimezone.loaded; // Get a time zone by location:const zone = getTimezone(50.047, 14.435);
Optionally, you can supply a timestamp as the third argument, and you will get the time zone at that time.
In case a time zone is found (which is the case if the arguments are valid), an object is returned:
{ "id": "Europe/Prague", "name": "CEST", "offset": 120, "designator": "+02:00", "type": "t"}
For a nautical time zone the result looks like:
{ "id": "Etc/GMT+3", "name": "-03", "offset": -180, "designator": "-03:00", "type": "n"}
where offset
is the offset in minutes at the moment of the query, and designator
is the zone designator according to ISO 8601.
Also note, the type is n
for nautical time zones.
License
This software is licenced under the MIT license.