Malfermita Reta Kalendaro

The Open Web Calendar uses ICS/ICal calendars online and displays them in one calendar. You can use it with Nextcloud, Outlook, Google Calendar, Meetup and other calendar systems using the ICS standard.

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To merge several calendars, please input the URLs of the ICS calendars here:

To embed the calendar, use this code on your website:

                    Vi povas vidi la rezultan kalendaron ĉi-sube.

You can make additional customizations of the calendar.


To change the title, please input the name of the calendar here:

Komenca dato

To change the starting date of the calendar:

Unua horo

To change the first hour of the calendar view:

Lasta horo

To change the last hour of the calendar view:

Tempa kremento

Change time increment in the day & week view:

Horloĝa opcio

Vi povas elekti inter la 24-hora kaj 12-hora horloĝoj; aliaj opcioj eblas. Vidi la specifon.


Vi povas ŝanĝi la lingvon de la kalendaro.



Vi povas elekti inter etosoj por la kalendaro.


Events may have locations and URLs. If you embed the calendar into a website, you can choose where the clicked link opens the page.

Tagoj en semajno

Propra stilo per CSS

You can change the color of your calendar and many more properties using CSS. Your customization has priority over the Skin you choose. Below, you can choose from a few customizations we prepared for you.

You can specify your own CSS properties if you like. These are examples of CSS classes to style events: .event {} .UID-... {} .CATEGORY-... {} .CALENDAR-INDEX-0 {} .CALENDAR-INDEX-... {} .TRANSP-OPAQUE {} .TRANSP-TRANSPARENT {} .CLASS-PRIVATE {} .CLASS-CONFIDENTIAL {} .CLASS-PUBLIC {} .STATUS-TENTATIVE {} .STATUS-CONFIRMED {} .STATUS-CANCELLED {} .PRIORITY-1 {} .PRIORITY-... {} .error {}

Stato de evento

Change the look of the event description depending on the status:

Loading Animation

In some cases, the server takes quite a time to load the calendar. In case the server uses a free plan on Heroku, the server needs to start first.

Kalendaraj langetoj

The Month view is the default. However, you can choose to show a different view in the beginning. Choose one:

It might be that you do not want to show all controls for the users to see. Choose here which controls you would like to display:


The timezone is taken from the browser of the user. If you want your calendar to be fixed in one timezone, you have the option below. Your browser uses this time zone: ŝargante…

Hosting the Specification

The calendar can be generated not only using the URL, but also through a JSON or YAML specification from a file. The customization above generates this specification:

                    You can download this specification and place it somewhere on the web. This way you are still in control over the customization of the calendar after you shared the link, e.g. on GitHub in a Gist.
                    Once you have placed the specification somewhere online, you can create a link like this one: