Daffy-dils

My attempt at contextual interpretation (It's ALL about context!) for the meaning of daffodils in everyone's lapels was a good attempt.

But not accurate.

My cock-and-bull story for Hiroko earlier (although i was honest and told her this was made up) was that the daffodils were for St. David's Day since they bloom at this time of year and their name sounds kind of like "David" if pronounced Welshy -- e.g., Daffydd.
The /ff/ is pronounced as an /f/ and the /dd/ is pronounced /th/, as in other.

The real reason for the daffodils' presence is because of St. David's Day, but, along with the leek, the daffodil is a symbol of Wales. In the days of pitched battles between the Welsh and various and sundry invaders (am taking this to mean the English), Welsh warriors would tie either a leek or a daffodil to their heads or attach it to their clothes so that they could identify each other and avoid killing off their own side. (info is slightly different on the site linked above, but my information came from a precious Welsh lady and who knows if the owners of this site are really Welsh?)

So there is your history lesson. I think we've all learned something here.