Check the current time anywhere in the world. Convert time zones instantly and ask our AI assistant anything — completely free, no sign-up required.
Enter a city name or IANA zone to instantly check the current time. Convert time between any two zones.
— TIME CONVERSION —
Monitor current times around the world. Add your favourite zones and sort them by preference. Data saved locally.
Ask any question about time, zones or conversions in natural language. The AI assistant will understand your query and provide a precise answer.
Ask: "What time is it in Madrid when it's 3:00 PM in NY?" — AI will explain and calculate.
AI knows over 600 IANA time zones and can answer questions about historical time changes.
Connect your own OpenAI, Anthropic, Gemini, Mistral, DeepSeek or other key — full control.
Without an API key the module uses built-in zone logic — fast and delay-free.
Learn what time zones are, how UTC offsets work and why daylight saving time is still a topic of debate.
A time zone is a region of the Earth that observes a uniform standard time. It is defined by its offset from UTC (Coordinated Universal Time). The Earth is divided into 24 main zones, but in practice there are over 600 due to national borders and historical regulations.
UTC (Coordinated Universal Time) is the international atomic time standard. GMT (Greenwich Mean Time) is the solar time observed at Greenwich. Although UTC and GMT are nearly identical today (differing by fractions of a second), UTC is the more precise standard used in programming, global IT and aviation.
Daylight Saving Time (DST) is the practice of advancing clocks one hour forward in spring and back in autumn. It is observed in the US, EU and many other countries. DST significantly complicates time conversions — modern applications must rely on up-to-date IANA databases.
IANA (Internet Assigned Numbers Authority) maintains the official time zone database (tz database / Olson database). It contains over 600 zone names in "Continent/City" format (e.g. Europe/Belgrade). The database is updated whenever governments change the rules and is freely available to developers.
In programming and databases, time is most commonly stored as Unix Epoch Time — the number of seconds elapsed since 1 January 1970 (UTC). This eliminates server-side time zone errors. The timestamp is only converted to the local time zone on the user's device.
Jet lag is a disruption of the circadian rhythm after crossing multiple time zones. Doctors recommend adjusting your sleep schedule to the destination time a few days before travelling. A flight from Vienna to Tokyo shifts time by +7 hours (winter) or +8 (summer). Travelling west is biologically easier than east.
Time zones are critically important for global business, programming, aviation and communication. Understanding how they work helps avoid costly mistakes when scheduling meetings, stock trades or flight timetables.
TimeZoria AI uses the browser's built-in native engine (Intl API) and a local IANA database. No network delays — everything works instantly, for free and without tracking!