Thursday marks a very rare calendric event. Thanksgiving aligns with Chanukah. This hasn’t ever happened since Abe Lincoln declared the first Thanksgiving in 1863. This is happening this year because of the alignment of two different systems of calendars (the Hebrew calendar based on the moon and the Gregorian Calendar based on the sun).
“The next time Thursday, November 28 will fall during Chanukah will be in the year 79811, assuming the Jewish calendar is not revised, according to one quantum physicist” (from Wikipedia page).
Here are a couple of sources for more info.
—“Thanksgivukkah: A Mash Of Two Holidays That’s Easy To Relish” from NPR