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1 definition by Gregg McCarrell

 
1.
UTC
Coordinated Universal Time. The civil standard of marking universal time; formerly known as Greenwich Mean Time (GMT), then Zulu Time (ZT). Universal time is denoted in 24 hour format, usually omitting the colon: 1432 (14:32) = 2:32 p.m. Coordinated Universal Time is marked either as UTC or Z (for Zulu)
The Olympics Opening Ceremonies will air on television starting at 1530 UTC.

or

The Olympics Opening Ceremonies will air on television starting at 1530Z
by Gregg McCarrell May 17, 2007