Astronomical phenomena

[Sergey]

Pandora has an axial tilt of 29 degrees, which is even more than Earth's.

That means that at higher latitudes on Pandora, as well as on the Earth, one can experience the midnight sun in summer and the polar night in winter.
So, here goes my question. What could Na'vi call the midnight sun and the polar night?
Not every Earth inhabitant calls the former phenomenon "midnight sun", e.g. native speakers of Slavic languages call it the polar day. So the answer might not be so straightforward.

[Toliman]

Midnight sun could be literaly translated as Tsawke kxamtxonä which sounds quite good, I would say.

But I have not idea for polar night... maybe trr luke tsawke (the day without the Sun)...

[Tìtstewan]

I have no idea what midnight sun could be, but polar night could very likely be txon tawsyuratanä.
Of course, my speculations.

[Toliman]

That is nice idea! I like that