uSources:

(first entry is the actual calender, the rest additional information eg on how to parse it into radar)
http://totalism.org/calendar (pad→html)
    pad→text: https://e2h.totalism.org/e2t.php?_=calendar

http://www.guckes.net/cal/, delivers ical?
https://c3voc.de/eventkalender, (source URL)
http://foss.events/
https://lwn.net/Calendar/
http://www.tolledomain.ch/dokuwiki/doku.php?id=calendar:overview
http://www.iaria.org/conferences.html, http://www.iaria.org/about.html, seems to be plain html
https://www.hackerevents.org, https://github.com/hackerevents/hackerevents
https://gnunet.org/conferences
https://webuild.sg/, https://gitter.im/webuildsg/webuild
https://spaceapi.ccc.de/
https://www.w3.org/participate/eventscal.html
https://ffbsee.net/termine.ics
https://c3woc.de/waffeln.ics

https://www.kinimatorama.net/ical feed greece athens

https://conferencelist.co/

https://c3d2.de/ical.ics c3d2 events
http://laforgecollective.fr/evenement/ coworking (Valence, Drôme, France) OpenAgenda
https://lemoulindigital.fr/agenda/ digital mediation center (Valence, Drôme, France) OpenAgenda
http://vatelier.fr/index.php/programme/ collective workspace (Valence, Drôme, France) GoogleAgenda

http://www.demoparty.net/ List of demoparties (artistic coding parties) with dates and a map; iCal, RSS

hackeragenda.be
hackeragenda.nl (or similiar?)

Lists of sources, so called "list of lists"
http://www.guckes.net/cal/sources.html
http://totalism.org/calendar#Event sources (list of lists)
https://hackeragenda.be/
https://hackeragenda.fr/ (down?? yes)
http://agendadulibre.org (also has sites for CH, BE, Brasil…)
http://agendadulibre.qc.ca
http://agendadulibre.be (RSS, iCal, twitter for day events)
https://Indyhackers.org has
webcal://calendar.google.com/calendar/ical/ig7e0j6v8ub9q6kga256n77048%40group.calendar.google.com/public/basic.ics
http://montreal.murmitoyen.com/ : an aggregator for many cultural and social events in Quebec (you have to choose the name of the city). 

gnunet.org has a list of conferences, too. 

BH USA 2016, DEF CON 24, BruCon, HackInParis, HITB Amsterdam, NullCon, GroundZero, c0c0n, XorConf, 

Browsing through existing events (worldwide) and noting them - often they have a list of "community partners" or such, where they link on a bunch of other, similar events.

https://dataharvest.eu/


nz.js(con); New Zealand JS Conference 2017
@ Decentralized Web Summit
@ New Zealand Internet Research Forum
@ Data Terra Nemo 2015
@ JS.LA April 2015
@ nodeconf.eu 2014
von: https://www.scuttlebutt.nz/talks.html

18:15 < ntropy> sva: you're building an aggregate & global calendar of tech events?
18:17 < ntropy> have you seen the rojak calendar on hackerspace.sg?

The URL of my website : https://www.hackerevents.org
https://github.com/hackerevents/hackerevents

http://ipcindia2017.org/

https://toorcamp.toorcon.net/

=========
https://icmconference.org/

 https://mobile.twitter.com/linuxconfau
 https://mobile.twitter.com/pyconau   mithro@mithis.com  
             https://mobile.twitter.com/TimVideosUs  https://mobile.twitter.com/HardwareCon  
             https://mobile.twitter.com/numatolab pyconau radar list


08:48 < notthetup> sva: sorry about that. but feel free to ask any questions about webuild.sg 
                   here or https://gitter.im/webuildsg/webuild :)
08:48 < RotiPrata> [ webuildsg/webuild - Gitter ] - gitter.im
09:05 < icedwater> Not in #webuildsg? :P

https://www.fsf.org/blogs/community/libreplanet-2018-lets-talk-about-freedom-embedded/

[1] https://cpa.cryptorave.org
[2] https://catarse.me/cryptorave2017

Temporary website: https://cryptorave.org
Interview about CryptoRave - https://www.eff.org/node/84418
Twitter: https://twitter.com/cryptoravebr
Facebook: https://facebook.com/cryptorave

http://ict4peace.org/

https://open-access.net/community/open-access-tage/open-access-tage-2017-dresden/ 

https://webuild.sg/ 

https://news.ycombinator.com/item?id=13650903

www.humanops.com
19:34 <@blackbit> codec: bist du in http://www.humanops.com/ involviert oder 'nur' daran 
                  interessiert? bist du bei der veranstaltung am 29.03.? ich denke ich 
                  werde hingehen
19:40 <@wink> also dafür dass es schon 8 treffen gab ist 
              https://github.com/HumanOps/HumanOps/blob/master/HumanOps.rst arg kurz

https://conference.hitb.org/hitbsecconf2017ams/ 
partner events

https://fscons.org/2017/

https://hackinparis.com/

http://is-ra.org/c0c0n/

https://www.syssec.at/dachsecurity2017/

http://www.phdays.com/about/

cocon, hackin a box nl, ahardware.io, indocrypt, 
             crypta.in, 

https://atlas.ripe.net/get-involved/community/#!conferences

https://news.ycombinator.com/item?id=13650903

gnunet.org has a list of conferences, too. 

https://disobey.fi/
https://4ccon.fsmi.in/

http://www.cedille.pro/agenda/ coworking federation for Drôme (France) OpenAgenda

HackerAgenda has its own API:
https://www.programmableweb.com/api/belgium-hacker-agenda

WebOOB http://weboob.org/ has a CapAgendaEvent capability, so can do event scraping using python modules, with http://weboob.org/applications/boobcoming

Many other structures are usually federated by non-profits that aggregate events, sometimes on openagenda.org, like
- coworking spaces, eg. http://laforgecollective.fr/evenement/ which is also aggregated by the local coworking spaces group http://www.cedille.pro/agenda/
https://lemoulindigital.fr/agenda/


http://eventbrite.com/ ?

https://openagenda.com/ can integrate with websites, not really that much "open".


GPG KeySigning Parties calendars ???

There's a recent project to build on OpenStreetMap and add events, and I think a talk was given recently but I can't find where it was...
http://openeventdata.org/ ?
https://github.com/openeventdatabase/backend/wiki https://twitter.com/openeventdb I think it was this one.

Guidebook uses some JSON format internally. For ex: MozFest: https://guidebook.com/guide/114124/
JSON is at https://guidebook.com/api/v1/public_event/?guide__id=114124&limit=0 (locations (rooms) seem to be described elsewhere though).

https://cfp.openfest.org sofia, bulgaria, in november

italy: 
https://www.endsummercamp.org/index.php/Main_Page
https://hackmeeting.org/hackit17/index.en.html