Time & Random
Time Zone Converter
Convert a time between IANA time zones.
Results appear here.
What the result means
The time you type is a wall-clock reading in the zone named From, not necessarily the zone of this computer. The page asks the browser's Intl data for the offset of that zone, builds a UTC instant from the clock time minus that offset, and then formats the same instant in the To zone. The offset is checked twice, because a daylight-saving change can make the first guess an hour off. Both offsets are shown. IANA names such as America/New_York carry the region's daylight-saving rules, which are not a fixed number of hours from UTC. When a clock hour happens twice on a fall-back night, the result follows one of the two browser mappings and says that overlapping hours can map two ways. A spring-forward gap is labeled rather than invented as a real local time.
Related tools
Questions
What is an IANA zone?
An IANA zone is a named region such as America/New_York or Asia/Tokyo, not a fixed offset like GMT+1. The name carries that region's daylight-saving history. This page offers a fixed list of those names.
Does this handle daylight saving?
Yes, as far as this browser's time-zone data does. The offset comes from Intl for the instant being converted, so summer and winter can differ. On a fall-back night, overlapping hours can map two ways, and the result says so.
What if that clock time was skipped?
Some zones skip an hour when daylight saving starts. If the wall time you typed falls in that gap, it is not a real local time. The page still shows the instant the browser offset produced and labels the gap.