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Preliminary Dates for DST Switches

In most countries, the Daylight Saving Time / Daylight Savings Time (DST) schedule has been very stable in the past, so the dates and times of future DST switches are unlikely to change. However, in some cases there is reason to believe that the schedule may be altered in the near future. In these cases, the dates are marked as preliminary in our overview of past and future DST switches.

When is a DST date classified as preliminary?

Confusion over Daylight Saving Time in Australia and New Zealand

©iStockphoto.com/Luca di Filippo

timeanddate.com keeps a close eye on current political decision processes, public debates, and the time zone history in countries worldwide. Future DST switches are deemed preliminary if:

Other countries with preliminary DST dates include:

Please note: Non-preliminary DST switches can also change at short notice.

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If you have information about a DST switch that is listed as a preliminary date please let us know.