>From CBC Calgary, 4 September 2026. Some business owners in Alberta are starting to notice disruptions and discrepancies in their digital calendar and booking apps: https://www.cbc.ca/news/canada/calgary/alberta-permanent-daylight-savings-businesses-calendars-9.7331872
One business owner said "[t]his feels like a secret Y2K that we're not ready for, I think." Those on this list will know that these discrepancies are handled in a range of application-specific ways which are often not transparent to the end-user, and that neither applications nor standards really contemplate or allow for the definition of expected behavior when zone definitions change. As such, these issues tend to crop up anytime a timekeeping change is implemented with any less notice than the typical leadtime with which folks are booking appointments. The article mentions tz's role but misstates the date of release for 2026c, which contained Alberta's change, as 7 August instead of 8 July. -- Tim Parenti
