協定世界時
The official abbreviation for Coordinated Universal Time is "UTC". This abbreviation comes as a result of the International Telecommunication Union and the International Astronomical Union wanting to use the same abbreviation in all languages. English speakers originally proposed "CUT" (for "coordinated universal time"), while French speakers proposed "TUC" (for ""). The compromise that emerged was "UTC", which conforms to the pattern for the abbreviations of the variants of Universal Time (UT0, UT1, UT2, UT1R, etc.).