A commenter at the website Cigar Blog 101 traces the custom to the era of Milton:
"The custom of giving away cigars to celebrate the birth of a child had its origin in the latter part of the 17th century. Cigars were quite rare and they were to be treasured - Thus, when a man parted with a cigar it was an expression of deep emotional appreciation."
Our middle child is beside himself giddy in the fact he is now an older brother. To egg him on a little bit, I put together a gift he can pass out at school to help him celebrate in his own way.
In a cellophane bag I put a few green kisses and finished it off with some homemade shamrock twist ties. One side says "I'm Lucky!"
The other says "I'm a big brother now!"
I managed to tie having a baby with St. Patrick's Day.
I must be sleep deprived!