TIME-ZONE ABBREVIATION CONVERTER
Convert GMT, UTC, KST
and other time zones.
Type a familiar abbreviation such as UTC, KST, JST, EST, EDT, PST, or PDT and choose from matching fixed offsets.
GMT / UTC → KST
same day
—Choose a date and time.
—→—
Calculated with the fixed UTC offsets of the selected abbreviations.
QUICK REFERENCE
Common GMT
to KST times
How are abbreviations handled?
GMT and UTC are both UTC+00:00 here.
KST is UTC+09:00.
EST and EDT are separate choices with different offsets.
Before you convert
This tool uses abbreviations with fixed UTC offsets, not city-based time-zone rules.
Daylight saving is not automatic
Choose PST or PDT, and EST or EDT, explicitly. The date does not automatically switch an abbreviation for daylight saving time.
The calendar date may change
15:00 GMT is 00:00 KST on the next day. Check both the converted date and the day-shift label.
GMT and UTC share an offset
Both are treated as UTC+00:00. KST is UTC+09:00, so the difference is always nine hours in this calculator.