DebConf5 was held in Espoo, Finland, from July 10th to July 17th 2005.

https://debconf5.debconf.org/

DebConf 8 was held in Mar del Plata, Argentina, from August 10th to August 16th, 2008.

http://debconf8.debconf.org/

The 24th Debian Conference was held in Infopark, Kochi, India from Sunday 10th September to Sunday 17th September 2023.

https://debconf23.debconf.org/