Convert any time zone at a glance

How this world clock works

The globe you see is drawn from real solar geometry, not a picture. Every second we compute the subsolar point, the single spot on Earth where the sun is directly overhead, using the standard NOAA solar position equations (solar declination plus the equation of time). Every place less than 90 degrees from that point is in daylight; everywhere else is in night. The curve between them is the terminator, the moving sunrise and sunset line you can watch crawl across the map.

Local times follow the current IANA time zone data built into your browser, including daylight saving rules, half-hour offsets like India, and 45-minute offsets like Nepal. Governments can change future clock rules, so results are only as current as that browser data. Countries that span several zones, like the United States, Russia, Canada, Brazil, and Australia, show every zone side by side so you can see morning and evening inside one border at the same moment.

What the colors mean

• The bright side of the globe is in daylight; the yellow glow marks the sun's overhead point.
• The shaded side is past sunset; the deeper shade is past civil twilight, when the sky is truly dark.
• The thin line between them is the terminator: stand there and you would be watching a sunrise or sunset.

Compare time zones without offset math

The converter keeps every clock tied to one exact instant. Type a city, an abbreviation such as PST or WAT, a full IANA name, or a fixed offset such as GMT-4. Each comparison shows the local time, effective seasonal code, GMT offset, date relation, and difference from your reference clock. Daylight saving changes are resolved for the selected date, while a numeric UTC or GMT offset remains fixed. When a short code has several meanings, the converter asks you to choose the region instead of guessing.

Method and accuracy

Sunrise and sunset use the conventional definition of the sun's center at 0.833 degrees below the horizon, which accounts for atmospheric refraction and the sun's radius. Results are typically within a minute of published almanac times at ordinary latitudes. Inside the polar circles the site says so plainly: midnight sun when the sun never sets, polar night when it never rises. Times are informational and should not be used for religious observance or aviation without checking an official source.