Changements climatiques: voici comment David Usher veut passer le message, Les Affaires le 13 mars, 2017

Universal Time Zone, Globe and Mail, April 18, 2016

Counting Down to 2º, Future Earth Blog, April 21, 2016

Clock counts down time for critical climate change, Radio Canada International, April 20, 2016

Montrealers do their part for Earth Day, CTV News, April 22, 2016

David Usher joins special Earth Day project at Concordia University,, April 22, 2016

David Usher, Timekeeper,, June 9, 2016