Thanksgivukkah is a holiday name portmanteau neologism given to the convergence of the American holiday of Thanksgiving and the first day of the Jewish holiday of Hanukkah on Thursday, November 28, 2013. It was the result of a rare coincidence between the lunisolar Hebrew calendar and the Gregorian calendar. Because the calendars are not calculated the same way, Hanukkah appears from year to year on different dates on the Gregorian calendar, ranging from late November to early January.

In linguistics, a blend—also known as a blend word, lexical blend, or portmanteau—is a word formed, usually intentionally, by combining the sounds and meanings of two or more words. English examples include smog, coined by blending smoke and fog, as well as motel, from motor (motorist) and hotel. The component word fragments within blends are called splinters.