UTC vs GMT
UTC is the modern global time standard used for precise timekeeping; GMT is a time-zone/mean-time label commonly used in everyday contexts.
For practical scheduling
UTC and GMT often show the same clock time, but the terms are not identical. UTC is an atomic-time standard, while GMT historically refers to mean solar time and is also used as a time-zone label. Software systems should usually store timestamps in UTC and convert them to a named local time zone for display.
Why “GMT+2” can be misleading
A fixed offset tells you only the difference from UTC at that moment. It does not tell you whether daylight saving rules will change later. For recurring schedules, use a named zone such as Europe/Paris rather than a fixed GMT offset.