I’ll introduce how to load() and use moment.js and moment-timezone in MongoDB shell.

Download moment.js and moment-timezone-with-data-*.js

First, download moment.js and moment-timezone-with-data-*.js files from the official site.

At the time of writing, moment-timezone-with-data-*.js was moment-timezone-with-data-2012-2022.js.

moment-timezone-with-data-2012-2022.js contains timezone data within the file, so this data is necessary when you want to handle timezones accurately from mongo shell.

• momentjs.com/downloads/moment.js
• momentjs.com/downloads/moment-timezone-with-data-2012-2022.js

By the way, the files are also available in the following GitHub directories:

• moment/min at master · moment/moment
• moment-timezone/builds at master · moment/moment-timezone

load() in mongo shell

Load() and use the downloaded moment.js and moment-timezone-with-data-*.js in mongo shell.

$ mongo yourdbname
> load("moment.js")
true
> load("moment-timezone-with-data-2012-2022.js")
true

> moment("2017-05-02 00:00:00").tz("America/Los_Angeles").format("YYYY-MM-DD HH:mm:ss")
2017-05-01 08:00:00

Alternatively, writing the load() process in mongorc.js is recommended since you can always use it.

mongorc.js

load("/path/to/moment.js");
load("/path/to/moment-timezone-with-data-2012-2022.js");

Please make use of moment.js and moment-timezone.js for a comfortable MongoDB life.

That’s all from the Gemba.