Get the first day of the current year using Moment.js

To get the start date and end date of any given year. You can pass a year as a parameter to moment.

startDateOfTheYear = moment([year]);
endDateOfTheYear = moment([year]).endOf('year');

You could do this:

moment().startOf('year');

format by doing something like this:

moment().startOf('year').format('MM/DD/YYYY');