I don’t discount it, but I am curious and open to what the truth is. I also don’t pretend to be an expert in translating the Bible, but others with credentials have indicated that the translation of morning/evening being the beginning/end of a definite period of time is valid.
You don’t think God wrote the Bible in English, do you? Even in English, we say things like “morning in America”, so discounting this as a possibility doesn’t seem foolish to me.