Time Zone Converter
Convert a date and time between two time zones, with daylight saving time applied automatically as needed in each zone.
Daylight saving time is applied automatically
Each time zone (Europe/Madrid, America/New_York...) has its own daylight saving time rules, with different switch dates depending on the country and hemisphere — this tool uses the browser's own time zone database (IANA), always kept up to date by the system, never a fixed "UTC+X" table that would go stale as soon as a country changed its rules.
Why adding or subtracting hours by hand isn't enough
The difference between two time zones isn't always the same throughout the year: for example, Spain and much of the US switch to daylight saving time on different dates, so the gap between Madrid and New York can be 6 hours for most of the year, and slightly different during the weeks when only one of the two has already switched.