Interim guidance for Egypt DST changes 2026

For Windows devices in Egypt, a workaround is available for an issue affecting Daylight Saving Time (DST). Between April 24 and April 30, 2026, calendar events and meeting times in Egypt will appear off by one hour only for Windows Server 2016. This is due to a calendar edge case: a five-week April in 2026. Clocks will be correctly set to Egypt DST time zone on May 1, 2026, without any further intervention. If needed, a temporary workaround is available for the affected week.    When will this happen: The workaround is available today. April 24-30, 2026: Affected devices might see calendar events off by an hour. May 1, 2026: Clocks will be correctly set to Egypt DST time zone without any further intervention, whether you use the workaround or not.   How this will affect your organization: If your organization has devices affected by this issue and you don’t apply the workaround, the impact is as follows: Clocks will not be advanced by an hour at 12:00 a.m. on April 24, 2026, for the Egypt time zone until 12:00 a.m. on May 1, 2026.  Clocks will be automatically advanced by an hour at 12:00 a.m. on May 01, 2026, for the Egypt time zone. If you apply the workaround, you can avoid this issue during the last week of April 2026.   What you need to do to prepare: No action is needed if you don’t use Windows Server 2016, and all other devices use in-support versions of Windows. If your devices are affected, you can use a temporary registry setting workaround. No action is needed after May 1, 2026. On that date, all in-support systems will show the correct Egypt DST time automatically.    Additional information: See complete guidance in Interim guidance for Egypt DST changes 2026.  Visit the official policy page at Daylight saving time help and support.  Learn How Windows manages time zone changes.