Great article by Rabbi Benjamin Blech here, explaining why the traditional Rosh HaShanah greeting should not be translated Happy New Year. It is rather a wish for a meaningful, Good Year.
Of course, while goodness trumps happiness, goodness and meaning naturally lead to happiness.
Goodness, prosperity, health, happiness will make the year sweet.
Filled with as many blessings as the pomegranate.
...sweeter than honey, than honey from the honeycomb.
