A day/week/monthly calendar component for React.


  • Only includes the minimal amount of features needed.
    • For instance there's no paging controls provided, since they can easily be implemented outside the component. This allows Dayz to be used both as a traditional next/previous month calendar or as part of a scrolling infinite view.
  • Modern styling and layout
    • Uses flexbox layout (no tables)
      • Currently is IE 11+ only. IE 10 could be supported if someone wants to lookup the -ms flexbox vendor prefixes. (PR's welcome).
    • All heights/widths are specified as percentages so the component will size to fit whatever container it's rendered into.
    • Styles are written in scss with variables that can be modified for customized builds.
  • Care is taken to retain elements when switching view types, this allows minimal DOM reflow and allows nice animation effects where events warp into position.

Pre version 1.0.0 breaking changes will happen on the minor version while feature and patches accompany a patch bump.



npm install dayz --save
-- or --
yarn add dayz
import React from 'react';
import Dayz from 'dayz';
// could also import the sass if you have a loader at dayz/dayz.scss
import 'dayz/dist/styles.css';
import moment from 'moment';

// would come from a network request in a "real" app
const EVENTS = new Dayz.EventsCollection([
    { content: 'A short event',
      range: moment.range( date.clone(),
                           date.clone().add(1, 'day') ) },
    { content: 'Two Hours ~ 8-10',
      range: moment.range( date.clone().hour(8),
                           date.clone().hour(10) ) },
    { content: "A Longer Event",
      range: moment.range( date.clone().subtract(2,'days'),
                           date.clone().add(8,'days') ) }

class MyComponent extends React.PureComponent {

    render() {
        return <Dayz



The Dayz component accepts these properties:

  • date (required): An momentjs instance that controls what range is displayed. The calendar will automatically calculate the month or week that contains this date and display the appropriate range.
  • events (optional): An Dayz.EventsCollection instance that contains events that should be displayed on the calendar.
  • highlightDays: an array of days that should be highlighted. Each day can be a string date that momentjs accepts, a JS Date object, or a momentjs date.
  • display (optional, defaults to 'month'): One of month, week, or day.
  • onDayClick, onDayDoubleClick (optional): A function that will be called whenever a day is clicked, it's passed two variables, the event and a momentjs date. Hours/Minutes are added to the date to reflect how far down the Y axis was clicked
  • onEventClick, onEventDoubleClick (optional): A function that will be called whenever an event is clicked, it's passed two variables, the event and the layout information for the event. The layout has an event subkey that includes the event itself.
  • displayHours (optional): defaults to 7am to 7pm or the earliest/latest event's hour.
  • timeFormat (optional): defaults to ha configures y labels time format


  • npm start starts up a local development web-server which rebuilds files when changed
  • npm test runs unit tests
  • npm run build compiles files in preparation for publishing