Similarly, it became unusual for a couple to be wed in May as this was the traditional start of Summer and was marked by a Pagan feast: Bealtane.These beliefs are the origin of the old marriage song:       Marry when the year is new, always loving, kind, and true.This made sense as it was the day when the working week was done and people were free to attend the simple marriage ceremonies that were available at the time.
One must finish one's day off with a cup of Barrys finest, and perhaps a digestive biscuit or two to dunk while discussing the tales of the day. An insular island with a culture dating back thousands of years, after 800 years of oppression by our neighbours and you'll have that - a sheer sense of pride and comfort in our own customs that we associate life wherever we go with these clockwork behaviours. We tend to be proudly patriotic of our country, and jump at the opportunity to celebrate what ever the occasion.
The 16th Century Penal Laws prevented Priests from saying Mass never mind conducting the Sacrament of Marriage. The last of the Penal Laws was not repealed in Ireland until 1920.
Given this background and the unique identity of the native Irish people who were forced to practice their religion 'underground', it is not surprising that an Irish Wedding has a particular identity all of its own and has a number of specific traditions associated with it. In Ireland of centuries ago the most popular day to be married was a Sunday.
But I don't think that's why the people of is a born performer with golden locks and a colgate smile, but because it's just fun to both watch, and attempt to take part in yourself.
Even the concept of Halloween originally came from the Emerald Isle and some how the pagan ritual of dressing in scary satire to warn off evil spirits of the night caught on, and is now found as a very convenient way of getting free sweets.