You Don't Need Moment.js
If you are dealing with timestamps from the past (e.g. birthdays via a datepicker that constructs Date objects), then you should watch out for different browsers&#x27; inconsistent handling of Daylight Savings Time. Moment is really indispensable here, since it includes a database of past years&#x27; DST transition dates. I wrote a blog post about it here: <a href="https:&#x2F;&#x2F;illuminatedcomputing.com&#x2F;posts&#x2F;2017&#x2F;11&#x2F;javascript-timezones&#x2F;" rel="nofollow">https:&#x2F;&#x2F;illuminatedcomputing.com&#x2F;posts&#x2F;2017&#x2F;11&#x2F;javascript-ti...</a>