It hasn’t happened since The Gilded Age and won’t again for another 80,000 years. It’s the convergence of Thanksgiving and Chanukah: Thanksgivukkah. For the first time since 1888, the Jewish holiday of Chanukah shares a date with Thanksgiving; it’s a once in a lifetime holiday that calls for a once in a lifetime celebration.
Why?
The Jewish calendar is a 12 month lunar calendar, and occasionally a month is added in (like a leap month), which makes holidays fluctuate.
By the numbers:

• Thanksgiving and Hanukkah won’t converge again for another 79,000 years.
• Hanukkah was declared a Jewish holiday 2178 years ago.
• Thanksgiving was declared a national American holiday (by Abraham Lincoln) on the last Thursday of every November in 1863.
• The last time the convergence happened was 1888.

The last time Thanksgivukkah happened:

• Benjamin Harrison defeated Grover Cleveland in the presidential election.
• The USC Trojans (then Methodists) played their first football game.
• Jack The Ripper’s last victim was found.
• Delta Delta Delta was founded at Boston University.
• The Guilded Age

Menu:

• Sweet Potato Latkes
• Turkey Egg Rolls with Cranberry Dipping Sauce
• Sweet Potato Noodle Kugel
• Challah and Apple Stuffing
• Cranberry Sauce-Filled Sufganiyot
• Challah Bread Pudding

Connections:

• Both Chanukah and Thanksgiving are holidays centered around food.
• Both holidays have the overarching theme of “being thankful.”
• Both holidays are largely incorporate family.

Traditions:
The Menurkey
Instead of the hand print turkey commonly made in preschool classrooms, Jewish children have created a new invention: The Menurkey. It consists of two handprints (the thumbs meld together to make the ninth candle, the shammash, which doubles as the turkey’s head) instead of one.
Cornocopias overflowing with gelt
It’s fifty percent Thanksgiving, fifty percent Chanukah.
The Pilgrim Buckle Yarmulke
Adorn the traditional head covering with a pilgrim buckle to combine the holidays.