Question: If we believe that Sunday is Yom Rishon of Creation, then what do we do with the given date of Creation being Monday, October 7, 3761 B.C.E. according to our current calendar? Are there other counts besides Seder Olam who calculated years from Creation?
EDIT: By "current calendar" I mean that the Oct 7 date is equivalent to 25 Elul [or 1 Tishrei] AM 1 [or 2]. Either way, the BeHaRD system our current Hebrew calendar operates from inherently begins from a Monday [Yom Sheni, Hence the Bet in "BeHaRD"], and neither the first day of creation nor the creation of Adam happened on a Monday. So how do we reconcile this?