FullCalendar
  • v7 latest
  • v6 (opens in a new tab)
  • v5 (opens in a new tab)
  • v4 (opens in a new tab)
  • v3 (opens in a new tab)
  • v2 (opens in a new tab)
  • v1 (opens in a new tab)
DemosDocs
  • Getting Help
  • Debug Templates
  • Reporting Bugs
  • Requesting Features
  • Contributing
Pricing
20.7k
  • Demos
  • Docs
  • Support
  • Getting Help
  • Debug Templates
  • Reporting Bugs
  • Requesting Features
  • Contributing
  • Pricing

Getting Started

  • React
  • Vue
  • Angular
  • Vanilla JS
  • Preact
  • Web Component
  • Salesforce LWC

Tools & Plugins

  • Agent Guide
  • Plugins
  • Premium
  • V7 Migration

Overall Display

  • Theme
  • Toolbar
  • Sizing
  • Virtual Rendering
  • Locale

Views

  • Month
  • TimeGrid
  • List
  • DayGrid
  • Multi-Month Stack
  • Multi-Month Grid
  • Timeline
  • Vertical Resource
  • Custom Views
  • View API

Date & Time

  • Date Model
  • Time Zone
  • Date & Time Display
  • Date Navigation
  • Date Nav Links
  • Week Numbers
  • Date Clicking & Selecting
  • Now Indicator
  • Business Hours

Events

  • Event Model
  • Event Sources
  • Event Display
  • Event Clicking & Hovering
  • Event Dragging & Resizing
  • Event Popover
  • Background Events

Resources

  • Resource Data
  • Resource Display

Accessibility

  • Accessibility
  • Touch Support
  • Printer-Friendly Rendering
  1. All Docs

Week Numbers

Display week numbers in various parts of your calendar views.

weekNumbers Determines if week numbers should be displayed on the calendar.weekNumberCalculation The method for calculating week numbers that are displayed with the weekNumbers setting.weekTextLong Like weekTextShort but only used when the date-formatting week setting is set to 'long'.weekTextShort The short heading text for week numbers.weekNumberFormat Controls the week number text.

Demo

Screenshot: weekNumbers activated weekNumbers activated
FullCalendar
Get started →
  • Blog
  • · Roadmap
  • · License
  • · Giving
v7.1.3 Released Oct 15, 2026 All releases →

Integration Docs

  • React 7.7M/MO
  • Vue 850K/MO
  • Angular 930K/MO
  • Vanilla JS 2.5M/MO
  • Preact
  • Web Component

Also from FullCalendar

temporal-polyfill

The Temporal API, polyfilled in under 20 kB.

18M downloads / month

© 2026 FullCalendar LLC

Built and maintained by Adam Shaw