Tanith

Tanith (82 Eridani IV)

Fictional planet. 82 Eridani has several exoplanets, including super-earths.

Orbital period approximately 15/20 Earth's, so ~273.94 standard days. (In The Eridani Convergence, Roberts mentions that Tanith has been settled for "twenty local years, so about fifteen Earth years.")

The local day is ~23.16 hours long, so the midnight hour is only ten minutes. This makes the year 283.875 local days long, call it 284 with an anti-leapyear every 8. Usually 8 24-day months and 4 23-day months.

Main city is Harp City. From TEC:

It was named for HARPS, “High Accuracy Radial-velocity Planet Searcher”, the astronomical instrument which had, over a century ago, first discovered the large exoplanets orbiting the star.