By default, moment objects are created in the local time zone. The local time zone is determined by your JS environment such as a browser or server like Node.js.

To change the default time zone, use with a valid time zone."America/New_York");

To reset the default time zone to local, use with no arguments.;

This is a global setting (shared by all modules).

Subsequent calls to will not affect existing moment objects or their clones.