Based on Standard Formats // Open Data

An event published in Internet is not just a HTML page with text.  It contains data: start, end, location, attachments.  When these data is saved in format called iCalendar, all software understanding iCalendar can extract and show the data.  There is variety of such software.  The servers of store and distribute the event data in iCalendar format.

To distribute the data, stored in iCalendar, the server offers two mechanisms:
• the CalDAV protocol describes how clients can synchronize data with the server.  Anytime something is changed, the client transfers only the differences.
• Storing all events in one big file.  The client software checks periodically whether the file is changed, and then downloads the whole file.

The advantage of CalDAV is, that on changes less data are transferred.  When provided just by server name, Mozilla Thunderbird and Gnome Evolution can utilize CalDAV.  The other software insists to have username in order to speak CalDAV.  For it, offers as username anonymous@domain with any password.

The advantage of the big file is, that there exists more software to work with it, as there is CalDAV capable software. offers two big files: - contains all events, from the past and future. - includes only events, which will happen in the future.  This file is smaller.

Of course, once entering in the software the username there is standard to detect the other settings, without asking the users for it.  Again of course, support the different standards to different level: some software needs more adjustments, in other software some data is not shown.

For each domain served by, the services are the same.  E.g. for the domain
• The file with the events from the future and from the past isа.ics
• The file with the events only from the future is
• For software, that insists on username to talk CalDAV, the username is with any password.
• For software, that needs only server name to speak CalDAV the server is

Details for the settings are in the Help menu ? here.

When 🕐︎Friday, September 11, 2020 at 13:00 - 13:30 GMT+3

Recurrence monthly, always on eleventh day of month

Created on Saturday, September 12, 2020 at 13:12:35 GMT+3

Last modified on Friday, April 22, 2022 at 12:58:10 GMT+3

Next repetition 🕐︎Thursday, July 11, 2024 at 13:00 - 13:30 GMT+3

Link to calendar

💾︎iCalendar file

Calendar  English