The original deadline was 1 Jan 2020, so to be fair the dev gave the Qora community a 5 month extension for the coin burn.
Oh, I see. Original was 1 Jan. So 6 Jun is fake one. That's why it was announced astonishing 4 days before.
It has been announced since last year, I think it was summer 2019 when it was being discussed how to go about the burn process.