There is so much more wrapped up in the eve of something than in its just being the literal "day before" another day which is, merely by force of calendar supposed to be more special. An eve holds both the promise of what the next day will bring yet holds as well the distinct honor of being a meaningful day itself.
Consider Christmas Eve, the lights both of candle and of the eye of a child shine in honor of what Christmas Day will be, yet shine they do on Christmas Eve and not on Christmas day.
On Christmas Day, there is the sense of joy and celebration, of arrival, of dare I say relief (?), of excitement and gratitude. On Christmas Day, the flicker of the Christmas Eve candle has grown into the bonfire of Christmas Day. As Christmas Day grows into Christmas Night there is no anticipation left to carry into the morrow, no expectation of specialness to come just a pleasant placement into the heart of the memories that have been made.
Ah, but as the hours of Christmas Eve grow late, the heart grows softer, beats a bit faster, and becomes more ready to experience that which is to come...
New Year's Eve, whose very title, indicates that it belongs to the celebration of the New Year, holds little to looking back on the old year to which, by the calendar, it belongs. Like Christmas Eve, New Year's Eve is full of anticipation and expectation of the next day and all that the New Year might be. As the New Year's Eve clock marches toward midnight, acceptance of last year's accomplishments yields to the eagerness to make newer and more purposeful tracks on tomorrow's freshly fallen, unblemished year. On the eve, the accomplishment of living better is looked forward to but is not yet taken to task. The idea of doing better is not yet confused with the reality of a tinge of failure here and there on the eve. On the eve the possibilities are unspoiled and unconquered. On New Year's Day the conquering must begin.
So, friends and loved ones I wish you a special New Year's Eve and a Happy New Year, filled with living better, loving more, and laughing deeply!