dayjs

Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js.

dayjs().startOf('month').add(1, 'day').set('year', 2018).format('YYYY-MM-DD HH:mm:ss');

🕒Familiar Moment.js API & patterns

💪Immutable

🔥Chainable

🌐I18n support

📦2kb mini library

👫All browsers supported