Most people know that we read Az Yashir on Shabbos Shira and we put out bread for the birds. However this is the only Shabbos that has a special name simply because of what we read in the Parsha. ...
We all know that Moshe did not change הושע to יהושע until the story of the spies. Why in Beshalach, quite a bit before this, was his name written in full?