Coordinated Universal Time (UTC) is a high-precision atomic time standard. UTC has uniform seconds defined by International Atomic Time (TAI), with leap seconds announced at irregular intervals to compensate for the earth’s slowing rotation, and other discrepancies. The leap seconds allow UTC to closely track Universal Time (UT), which is a time standard based on the earth’s angular rotation, rather than a uniform passage of seconds. Time zones around the world are expressed as positive or negative offsets from UTC. In this role, UTC is also referred to as Zulu time (Z).
As a kid, I always thought that Greenwich Mean Time decided the offsets. Now, I understand that Greenwich Mean Time itself is derived from UTC (offset zero!). The difference is subtle, but there is indeed one.
Coming back to wordpress, maybe there is a way in wordpress to change the time zone. But, I could not find one, and so I believe that this is wordpress’ way of trying to be global and saying, “Use the Zulu time, reach the roots – we all come “out” of Africa.”:)