"It is evening here."
Because "Este itt van." emphasizes "itt" (it is in front of the verb), so it is a sentence that would be a good answer to "Where is evening?". Well, maybe, just maybe, I can see how "It is evening HERE" could do the same, but it is a bit unusual to say the least.
When I answer with the word "itt" it tells me that it's incorrect, and that I should have ommitted the "itt". I believe it is a mistake. Please correct it and thanks for the great work you guys have been doing!