Arc 4, no. I can't find the web novel translated (I think Fidds gave me something which was in japanese, which when translated looked like google translate lol) decently so I'm on wiki, anime and LN of what I can read knowledge.
I mean, I have some knowledge of arc 4 but not an expert to say the least.
And IC days? Hmm I think we're about a month in lol
No, 6 or 7 weeks. So a month a half/2 months