Tomorrow is the Fast of Tevet. As the JVL puts it:
The Tenth of Tevet (Heb, Asara b’Tevet) marks the day on which the Babylonian siege of Jerusalem began in the year 588 BCE, an event which eventually led to the destruction on the Temple in 586 BCE and the first exile from Israel. Though the day usually falls out near the time of Hanukkah, the two holidays have no significant relationship with each other. The Tenth of Tevet is considered a “minor fast” and orthodox Jews refrain from eating or drinking from sunrise to sunset on the day of fasting.
In Israel, the Tenth of Tevet has also come to be marked as a memorial day for the 6 million Jewish victims of the Holocaust. The kaddish (Prayer for the deceased) is recited on this day for people whose date or place of death during the Holocaust is unknown and that is how the date has gotten the unofficial Hebrew moniker, Yom Ha-kaddish ha-kleli, literally translated as The General Kaddish Day.
Tomorrow is also, according to the secular calendar, a day of some significance. It therefore gives a rare opportunity, to mix greetings: to use the traditional Rosh Hashanah greeting, and make it do double duty. Therefore:
Happy New Year. And Well over the Fast!
[Thanks to Kenneth and Peter for the tip.]