# Welcome to the Highcharts Gantt JS (gantt) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# time.timezone

A named time zone. Supported time zone names rely on the browser implementations, as described in the mdn docs. If the given time zone is not recognized by the browser, Highcharts provides a warning and falls back to returning a 0 offset, corresponding to the UTC time zone.

The time zone affects axis scaling, tickmark placement and time display in `Highcharts.dateFormat`.

Setting `timezone` to `undefined` falls back to the default browser timezone setting.

Until v11.2.0, this option depended on moment.js.