AddThisEvent is
an Add to Calendar button,
a Subscribe to Calendar button
and Event Management

If you are looking for an “Add to Calendar” button or
a “Subscribe to Calendar” button or an API for on the fly event
creation or an Event Manager for your website or newsletters,
then look no further. AddThisEvent offers an easy, convenient
way to create event buttons. It's easy to use and install.

AddThisEvent was created in Palo Alto, California, May 2012 by
Michael Nilsson and is today considered to be the standard
“Add to Calendar” button on the Internet.

Try our buttons

Add to Calendar 09/16/2015 09:00 AM 09/16/2015 11:00 AM America/New_York Summary of the event Description of the event Location of the event Organizer Organizer e-mail false MM/DD/YYYY
Subscribe to Calendar

And our:

  • "Add to Calendar" + "Subscribe to Calendar" buttons for newsletters
  • Event Manager
  • Custom Templates
  • API for on the fly event creation

AddThisEvent is:

  • Easy to use and install
  • 100% themable
  • Timezone and DST compatible
  • The leading calendar widget in the world
  • Great support (we will actually help you)


You're in good company. Awesome Internet Superstars
and Offline Ninjas use AddThisEvent too


Install your new buttons in a few minutes

AddThisEvent helps you create an “Add to Calendar” or a “Subscribe to Calendar” button in a matter of minutes. Get started using our simple yet beautiful pre-built button or customize the design to fit your website or application. Do not worry about daylight savings time and time differences in all the different regions of the world - we have got it covered. AddThisEvent has been tested by millions of users and is entrusted by companies from San Francisco to Sydney.

Works everywhere

AddThisEvent is carefully crafted and optimized for the most common browsers, tablets and mobile devices. In our mindset we go "way back" and so does our optimization - our buttons are even optimized for Internet Explorer 6 (yes, some people in the world still use Internet Explorer 6).

What about newsletters, campaign management tools and social media like Facebook and Twitter?

Sharing your event on social medias like Facebook or Twitter is easy with our event management tool. Simply create your event and share it or insert the event link in your newsletters or campaign tools. With our event management tool you are able to provide links for direct downloads or create a landing page where your users can add your event to their calendar of choice.

Custom templates and Direct URL Method (API)

If you’re comfortable hand-coding HTML, then you can customize the apperance of the landing page. We have created simple block elements and tags which makes it fast and easy to setup your own design. You can create an unlimited number of templates.

Our Direct URL Method (API) is a method suitable for developers who develop their own newsletters, work with Flash, mobile development etc.


Non-commercial Usage - Free

If you want to use the "Add to Calendar" button for a personal website, your schools website, your personal blog or a non-profit organization then you do not need to become a Premium Member, just go on and use it.

Commercial Usage only $4.8 /month (if billed annually)

The AddThisEvent buttons, Event Manager and API is going to save you weeks of programming, so consider becoming a Premium Member. As a Premium Member our services become unbranded, you get access to all features and you support AddThisEvent to become even better.

Key Features Non-commercial Usage
Commercial Usage
Pre-built “Add to Calendar” button
Calendar generates & downloads Unlimited Unlimited
Timezone and DST compatible
SSL support (https)
Advanced “Add to Calendar” javascript settings
Change labels in “Add to Calendar” dropdown
Custom options in “Add to Calendar” dropdown
Custom “Add to Calendar” themes gallery
Custom CSS (ability to customize the “Add to Calendar” button)
Event reminders in Outlook, iCalendar (MAC) etc.  
Recurring events in Outlook, iCalendar (MAC) etc.  
Pre-built “Subscribe to Calendar” button  
Calendar generates & syncs   Unlimited
Timezone and DST compatible  
SSL support (https)  
Advanced “Subscribe to Calendar” javascript settings  
Change labels in “Subscribe to Calendar” dropdown  
Custom options in “Subscribe to Calendar” dropdown  
Custom “Subscribe to Calendar” themes gallery  
Custom CSS (ability to customize the “Subscribe to Calendar” button)  
Event Management Tool for newsletters and campaign tools, eg. MailChimp, Marketo, Salesforce, CampaignMonitor, flash, iPhone, Android etc.  
Direct URL Method (API) for dynamic calendar creation with optional landing page  
Custom landing page for events  
All AddThisEvent branding removed  
Support   Priority


Building AddThisEvent with our users is the real deal to us.
We keep track with all changes made so our users are kept in the loop.

Update (Thursday, August 20, 2015)


On a daily basis a few of our users get their subscription renewals declined by their financial institutions / credit card companies. It can be due to many reasons. One reason could be an unintentional hold on their account for certain transaction types. It unfortunately results in their account being degraded to a free account until the payment is processed successfully.

We have set up a service that will notify our users if their credit card was declined. An information service so they are able to change credit card if necessary.

Update (Tuesday, August 4, 2015)


A lot of our users are using e-mail management systems to handle their e-mail campaigns. E-mail management systems collects statistics by converting and redirecting links to their own system, then they forward the links to the right destination.

Some e-mail management systems do not clean up their links when forwarding to the right destination. That resulted in us not being able to handle some events in the "One-time Events" section correctly.

The issue has been solved by taking "malformed" URL´s into account.

Update (Monday, July 20, 2015)


In AddThisEvent we are using timezone´s to handle date and time correctly across borders and daylight savings time.

Selecting the correct timezone can be a little confusing though. That is why we have built a timezone lookup functionality.

Our timezone lookup functionality is located everywhere you can select your timezone. You can locate the timezone by entering e.g. address, capital or country of the event.