check format of date with moment.js

Question

I am taking input from calendar in my screen which is of this type

DD-MMM-YYYY HH:mm a

but user can provide date from keyboard. Now I have to

Answer 1

If you don't have a particular date format then you can also use Array of formats,

moment(checked_date, [DATE_FORMAT1, DATE_FORMAT2]).format(DATE_FORMAT)
 === checked_date