UTC vs GMT: what's the difference?
These two abbreviations are often used interchangeably, but they technically mean slightly different things.
GMT (Greenwich Mean Time) is historically the mean solar time at the Greenwich meridian in London. It's a specific time zone, used by the UK in winter.
UTC (Coordinated Universal Time) is a scientific time standard based on atomic clocks, used as the reference point for every time zone in the world (expressed as UTC+X or UTC−X).
In practice, GMT and UTC show the same time day to day, to within a fraction of a second (managed via leap seconds). The difference is mostly technical and historical: GMT is one particular time zone, UTC is the universal standard every zone is defined against.
That's why software and computer systems almost always use UTC internally, even when the public-facing display still says "GMT" out of habit.
Every time shown on Chronova is calculated from UTC and the IANA time zone database, the reference nearly all computer systems worldwide rely on.
Handy tools
Find the time slots that work across several time zones at once.
Convert a time from one city to several others at a glance.
The exact dates for the switch to and from daylight saving time in Europe, the United States, Canada and Australia, calculated automatically every year.