The Missing Hour and the Repeated Hour: What the Time Zone Planner Does on the Four 2026 Clock-Change Dates
I work on OnePassApps, the team behind app.onepassapps.com, so this is our own app measured on our own build. Three of our earlier posts on the Time Zone Planner covered the two-place plan, the reference-place swap and the eight-place cap. Each of them stopped short of one thing: what the app does on the four dates in 2026 when the clocks actually change. Our Telegraph post on the reference-place…
The Time Zone Planner, created by OnePassApps, demonstrates how time zones change on specific dates in 2026. On March 7 and 8, 2026, New York was on GMT-5 and GMT-4 respectively, while London was on GMT-5. On March 29, London moved forward one hour to BST, causing a missing hour from 01:00 to 01:59 in London. On October 25, London reverted to GMT-4, creating a repeated hour from 01:00 to 01:30 in London. The planner adjusts for these changes, showing the correct working hours and the missing/repeated hour accordingly.
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