Shore-leave planet, 2269

The Omicron Delta region, surrounding the Shore Leave Planet.

Omicron Delta region was a region of space in the Milky Way Galaxy.

In 2267, the USS Enterprise discovered the Shore Leave Planet in this region of space. (TOS: "Shore Leave") The starship returned to the region for some rest and relaxation in 2269. (TAS: "Once Upon a Planet")

The novelization of "Once Upon a Planet" (as published in Star Trek Log 3) referred to this area as the "Omicron region," omitting the word "Delta" from its name.