DST Converter
Convert a time across a daylight-saving change
The two cases that break scheduling: a wall time that never existed, and one that happened twice. Both are detected and both instants are given.
Questions people ask
The things that come up about dst converters, answered plainly.
What happens to 02:30 when the clocks go forward?
It never happens. The clock jumps from 01:59:59 to 03:00:00, so any job or alarm set for 02:30 either does not run or runs at a substituted time, depending on the system. The page flags the gap explicitly.
What about the hour that happens twice?
In autumn, 01:30 occurs twice — once on summer time and once on standard. A bare local timestamp for it is genuinely ambiguous; the page gives both instants and their offsets so you can pick.
Related tools
Convert between zones, watch a board of cities, and find the hour that suits everyone.
DST CheckerWhether a zone is on summer time right now, when it next changes, and the exact instant of the change — found by search, to the millisecond.
Time Zone ConverterOne instant, two clocks. Pick the zones, enter a time, and see what it reads in the other — with the date shift, the offset difference and any daylight-saving trap called out.
UTC ConverterUTC in, local out, or the other way round — with the offset that applied on that date, which is not always the one that applies today.
Time Zone DifferenceThe gap between two zones right now, and on any date you pick — because it changes across the year, and the two zones rarely change on the same day.