Convert time between cities worldwide. See current local time and time differences instantly.
The Earth is divided into 24 time zones, each offset from UTC (Coordinated Universal Time). Moving east adds hours, moving west subtracts.
UTC is the global reference. New York is UTC-5 (or UTC-4 during daylight saving), London is UTC+0 (or UTC+1 BST), Tokyo is UTC+9. Some zones use half-hour offsets: India (UTC+5:30), Nepal (UTC+5:45).
Daylight saving time (DST) shifts clocks forward 1 hour in spring and back in fall in many countries. This changes the UTC offset seasonally.
Not all countries observe DST. The US, Canada, and most of Europe do. Most of Asia, Africa, and South America do not. This converter uses your browser's timezone data which accounts for DST automatically based on the current date.
Note: Time conversions use your browser's built-in timezone data (IANA Time Zone Database) which accounts for daylight saving time. For historical date conversions, DST rules may differ from current rules.