At the end of the day, the magic isn't date related, somehow driven by a crystal ball falling on top of a building, or thousands of drunkards gathered in the freezing cold. It is driven by our own desire, the need for something different masked by the hope that we can be driven by something greater than our own will. We hope the new year will somehow wash away days, weeks, months of excuses from the prior year and we will be revitalized with new vigor to put them all at bay.
We do not need to wait for that mythical moment to make a change, to make a difference, to change our outlook. We have the power every day to make it happen, to leave those excuses behind. If it's good enough to have as a resolution on January 1st, it's good enough to have on June 12th. Take advantage of the time you have and make the most of each day - you only get so many of them. Don't dwell on the things you don't/won't do, it only saps your energy.
Clear your mind of those things gone by
You can't change the past, why even try
You can build upon all you've learned
You can start today.