Parse current date to U.S. Eastern time + customize short months & a.m./p.m.

date-to-eastern.js

// installation:
//  npm install dayjs dayjs-plugin-utc --save
// note: if not already a module, in package.json add "type":"module",

import dayjs from 'dayjs';
import updateLocale from 'dayjs/plugin/updateLocale.js';
import utc from 'dayjs/plugin/utc.js';     
import timezone from 'dayjs/plugin/timezone.js';

// set up the as-of date
dayjs.extend(utc);
dayjs.extend(timezone);
dayjs.tz.setDefault('America/New_York');
dayjs.extend(updateLocale);
dayjs.updateLocale('en', {
  monthsShort: [
    'Jan.', 'Feb.', 'March', 'April', 'May', 'June',
    'July', 'Aug.', 'Sept.', 'Oct.', 'Nov.', 'Dec.',
  ],
  meridiem: (hour, minute, isLowercase) => (hour >= 12 ? 'p.m.' : 'a.m.'),
});
let now = dayjs().tz('America/New_York').format('dddd, MMM D [at] h:mm a [Eastern]').replace(':00','')



//// if not using modules ////

const dayjs = require('dayjs')
const utc = require('dayjs/plugin/utc')
const updateLocale = require('dayjs/plugin/updateLocale.js');
const timezone =require('dayjs/plugin/timezone');