Add Events To Apple/Google/Yahoo/MicroSoft Calendars – atcb.js
A JavaScript library that lets you add custom events to popular calendars and automatically generates iCal/ics files for Apple.
Date & Time
Vanilla Calendar JS Library for Date Picking, Scheduling, and Timelines
A JavaScript calendar library with date picker, schedule grid, timeline view, and helper utilities for vanilla JS, React, and Vue.
Vanilla JS Date Picker with Range Selection – EssealDatePicker
Zero‑dependency date picker that works with any framework. Includes min/max dates, custom formatting, and programmatic control.
Vanilla DateTime Picker: Zero-Dependency JS Date-Time Input
Zero-dependency datetime picker with calendar navigation, keyboard shortcuts, and time selection. ESM and IIFE builds included.
Feature-rich Calendar & Date Picker Components – Cally
A lightweight JavaScript library for feature-rich calendar components. Build custom date pickers with ease.
Google Material Inspired Time Picker Component – timepicker-ui
A vanilla JavaScript library to create a customizable, beautiful, mobile-friendly time picker component inspired by Google Material design system.
Convert Timestamp To User-friendly Format – relative-time.js
A lightweight and standalone relative time JavaScript library that converts timestamps to human-readable time format.
Developer-friendly Date Picker In Pure JavaScript – thedatepicker
thedatepicker is a simple, customizable, developer-friendly date picker plugin implemented in pure (vanilla) JavaScript.
Elegant Accessible Date Range Picker In JavaScript – Hotel Datepicker
A simple, flexible, customizable, accessible, and multilingual date range picker written in pure JavaScript.
Convert Human-readable Duration Strings to Milliseconds
Convert timeout strings to milliseconds in JavaScript. Handles “2 days 5 hours” format. Perfect for cache TTLs and rate limits.