* [spacetime 7.12.1](https://github.com/spencermountain/spacetime) – Lightweight date calculator for handling timezones and date-related operations.

* [node-geo-tz v8.1.7](https://github.com/evansiroky/node-geo-tz) – Node.js package for accurate geographical timezone lookup based on GPS coordinates.

* [TZF v1.2.1](https://github.com/ringsaturn/tzf) – Fast Go library to find timezones from latitude and longitude.