This is a weekly series on the latest happiness research. Learn and be merry! 

Happy Father’s Day – Millennial dads may be less satisfied than their Gen X and Boomer counterparts. According to the 2014 DDB Life Style Study, millennial dads are less likely to say raising a child brings them a lot of happiness (82%, vs. 87% of Gen Xers and 92% of Boomers) and more likely to say parenting is a real burden (41%, vs. 25% and 16%). Also, more millennial dads admit to not enjoying spending time with their kids (29%, vs. 22% and 14%) and preferring to spend time with friends (35%, vs. 20% and 12%). Finally, millennial dads are more likely to say their own happiness is more important than the happiness of others (49%, vs. 33% and 20%).

Rise and shine – Ikea’s “Life at Work” survey found that we’re happier if we wake up quickly, or take the time to cuddle, have sex with, hug, or kiss someone in the morning. Ikea surveyed over 80,000 people in eight cities.

Let’s hit the sack – According to a study presented at SLEEP 2014, the more in sync a couple’s sleep schedule is, the happier the wife is.

Photo by Flickr user Gwenaël Piase