Hi ChilliGirl and welcome.
To be honest its not easy to give you a definite answer on this one - as although somewhere between October and December is generally regarded as the best time of year to plant spring flowering bulbs in most Countries - I think that when is the best time to do this will depend very much on your climate - like for instance - in some parts of the world - late September to late October is considered to be the best time to plant Daffodils and November for Tulips - where as where I live - as its still far too hot at that time of year to plant spring flowering bulbs - we normally plant ours somewhere between late November and January.
In other words I think in reality if you are not living in a hot climate - you can't go too far wrong if you were to plant your daffodils and tulips somewhere between late October to November
Oh and I would just add that as there are many different varieties these days - there are sometimes even guidelines on the packaging as to when the best time for planting is