Date & Time
Handling Timezone In JavaScript – Spacetime
Spacetime is a pure JavaScript library used to manipulate, traverse, compare, and format dates and times across planet Earth.
Flat Style JavaScript Date Picker – flatpickr
flatpickr is a powerful and customizable JavaScript library which enables the visitor to pick a date/time/date range from a calendar.
Visualize Your Day As 144 Rectangles – Rectangles
Versatile Datetime Picker For Bulma – bulma-calendar
Easy Duration Picker In Vanilla JavaScript – html-duration-picker.js
A pure JavaScript duration picker that allows the user to pick duration (in hours, minutes, seconds) in a normal input field.
Developer-friendly Date Picker In Pure JavaScript – thedatepicker
thedatepicker is a simple, customizable, developer-friendly date picker plugin implemented in pure (vanilla) JavaScript.
Countdown Timer Plugin With Pure JavaScript – TimezZ
This is the standalone version of the jQuery TimezZ plugin that lets you create a customizable countdown timer in days:hours:minutes:seconds format.
Full Year Calendar In JavaScript
A full year calendar that can be used on your website. The calendar was written in pure JavaScript and you can switch between years in an easy way.
Time Zones And UTC Converter In JavaScript – xtz.js
A lightweight, blazing-fast JavaScript library for converting between time zones as well as translating between Relative TimeZone and Absolute UTC.