Anything's good, Zulu's very good. I assume post times will display adjusted for whatever offset I've selected.
. . . Warning: Nit Being Picked . . .
But note that, like others, I believe that if you settle, say, on US Pacific time, it's referred to as "Pacific Time." Depending on the time of year that becomes either "Pacific Standard" or "Pacific Daylight" time. But I can't count the times I've heard something along the following lines over the phone or online, in the middle of the Summer: "We're open nine to five Eastern standard time."