Thanksgiving is in October and the US November why?

There is no official reason for Thanksgiving being celebrated in November, but it's believed to be due to a combination of factors:

* Historical context: The first Thanksgiving, celebrated by the Pilgrims and Wampanoag in 1621, took place in the fall. While the exact date is unknown, it is thought to have been in late September or early October. However, the date of Thanksgiving was not standardized until the 19th century.

* Harvest time: November is traditionally the time of year when most of the harvest is completed in the northern hemisphere. Thanksgiving is a time of gratitude for the harvest, making November a fitting month.

* Presidential proclamation: In 1863, President Abraham Lincoln declared Thanksgiving a national holiday to be observed on the last Thursday of November. This cemented the holiday's place on the calendar.

So, while Thanksgiving might have historical ties to the autumn months, its current celebration in November is due to a mix of tradition, historical significance, and presidential decree.