This is, for me, unverifiable information; hence this question.
Someone with a deeper knowledge of German than mine has recently told me that auf can also mean during, just like bei.
For instance, this person has told me that bei Tage(e) or bei Nacht can equally be rephrased as auf Tag(e) and auf Nacht, without losing its meaning.
However, my own research has turned no proof that this might be true.
Is it true?