CalConnect Virtual Conference Autumn 2021

CalConnect Virtual Conference Autumn 2021

CalConnect Virtual Conference Autumn 2021 October 18-21 2021
Monday, October 18, 2021 to Thursday, October 21, 2021
Subscribe to the CalConnect Week Calendar.
Recent Changes: 

02 Jul 2021 - Initial post.

18 Aug 2021 - Preliminary Schedule added.

02 Sep 2021 - Schedule adjusted to Monday through Thursday and updated.

09 Sep 2021 - Link to CalendarFest web page added to Schedule entry for CalendarFest.

14 Sep 2021 - Added joint working group call with IETF SEDATE to session Wednesday at 1200.

28 Sep 2021 - Conference Schedule updated to current status; events  now on CalConnect Event Calendar.


The CalConnect Virtual Conference Autumn 2021 will be held via Zoom the week of October 18-22, 2021.  Our goal is to present a set of compelling sessions on issues CalConnect members are currently facing and possibly working on. 

The conference will be conducted on the North America Eastern time zone (UTC-5) and will take place Monday through Wednesday from 11:00 to 14:00 EST.  Thursday and possibly Friday, which  will have sessions at times convenient for our Far East and Australia colleages presenting the sessions, will be from 01:00 to 04:00 EST (this schedule may be adjusted as needed). 

The conference will be organized by day with each day having a list of sessions and session topics.  At this time we are not going to assign a specific time for each session within the 3-hour period, however we expect that most sessions will be no more than an hour including a question or discussion period and a short break.  Insofar as possible sessions will be scheduled to begin on the top of the hour.  All sessions will be recorded and available after the fact to registrants who were unable to be on a specific session. 

We also plan to offer interoperability testing during or adjacent to the Virtual Conference.  More details on this will be available when people register.

The Virtual Conferences will be open to members and non-members.  You must register in advance and pay the registration fee for the conference prior to Friday October 15 2021.  Please register for the conference at

Registration for the Virtual Conference is $50 U.S. per person. 

Registration Information 

Registration is open through Friday October 15 2021; please see to register. See the registration pages linked above for more information. Registrants will be sent the access information prior to the Virtual Conference.


Via Zoom. URL and access credentials will be provided to all registered attendees before the Virtual Conference. 

Test Event Schedule 

To be announced.

Conference Schedule 


Preliminary Schedule

This schedule will be updated as new information and new sessions are added. Please check periodically for changes and additions. 

All times shown are Eastern North America UTC-4 (daylight saving time)

Monday 18 October 2021
1030-1330 CalendarFest HIGHLIGHT SESSION
CalendarFest is a novel (virtual) event, which will let users and developers of (electronic) calendar applications, servers and related groupware systems share experiences and discuss novel ideas. Interested participants are invited to submit proposals for lightning talks. Please see for more information.
Tuesday 19 October 2021
1100-1130 Intros and Familiarization
- Quick discussion on Zoom and tools
- Introductions and welcome to newcomers
 1130-1200 Conference Welcome and Plenary
- TC Status
- Report from Board, next steps
- Plans for 2022 and beyond
1200-1300 Implementing JSCalendar HIGHLIGHT SESSION
- Working session on implementing JSCalendar with the experience of implementing in Bedework and Fastmail
1300-1315 CalConnect Calendar Developers' Guide
Introduction to the DEVGUIDE, latest changes and next steps
1315-1330 Review of Event Publication Standards
Summary of newly published RFC 9073 on Event Publication extensions
1330-1430 Time Zones Discussion
Reflecting on the discussions triggered by the recent Time Zone data changes
Wednesday 20 October 2021
1045-1100 Chat Time
1100-1200 Calendar Spam Issues and iMIP HIGHLIGHT SESSION
Updates to be provided
1200-1245 Date and Time Representations
- Non-Gregorian Calendar Systems
- What to expect from calendar systems?
- Standard representation of dates
- Joint public working group call with IETF SEDATE working group
1245-1300 Subsecond Support in iCalendar & JSCalendar (Design Session)
Add support for subseconds in date-time, durations, and recurrences
1300-1315 TC-CALENDAR Review
Review of ongoing work; status of current draft specifications
1315-1400 iCalendar extensions for Tasks and Relations
Review of previous and ongoing work.
1400-1430 Chat Time
Thursday 21 October 2021
Presentations and discussion
0200-0300 TC-DATETIME and ISO/TC 154 WG 5
Presentations and discussion
0300-0430 JMAP and JSCalendar/JSContacts Joint Session with IETF CALEXT and JMAP WGs
Joint public working group call with IETF CALEXT and JMAP working groups