demo 1:

demo 2:

demo 3:unix

demo 4:

demo 5:

demo 6:

demo 7:unix

const moment = require('moment');

const d = new Date('2019/06/01');

moment(d).format('MMMM d, YYYY'); // June 1, 2019

Date

YYYY: 4-digit year '2019'
YY: 2-digit year '19'
MMMM: Full-length month 'June'
MMM: 3 character month 'Jun'
MM: Month of the year, zero-padded '06'
M: Month of the year '6'
DD: Day of the month, zero-padded '01'
D: Day of the month '1'
Do: Day of the month with numeric ordinal contraction '1st'

'2019-06-01': YYYY-MM-DD
'June 1st, 2019': MMMM Do, YYYY
'June \'19': MMMM 'YY
'6/1/2019': M/D/YYYY

Time

HH: hour of day from 0-24, zero-padded, '14'
H: hour of day from 0-24, '14'
hh: hour of day on 12-hour clock, zero-padded, '02'
h: hour of the day on 12 hour clock, '2'
mm: minute, zero-padded, '04'
m: minute, '4'
ss: second, zero-padded
s: second
A: 'AM' or 'PM'
a: 'am' or 'pm'

'14:04': HH:mm
'14:04:03': HH:mm:ss
'2:04pm': h:mma
'2:04 PM': h:mm A

Date

Example	Output
`YYYY-MM-DD`	2014-01-01
`dddd, MMMM Do YYYY`	Friday, May 16th 2014
`dddd [the] Do [of] MMMM`	Friday the 16th of May