what day was Martinmas celebrated in germany in 1804

Martinmas in Germany in 1804 was celebrated on November 11.

Why that date

Martinmas, also called St. Martin’s Day or Martinstag, is the feast day of Saint Martin of Tours, and sources describe it as being observed on November 11 in the liturgical year. Historical descriptions of German Martinmas customs also place the celebration on that same date.

Brief context

In German-speaking regions, the day traditionally marked the end of the agricultural season and was associated with feasting, lantern processions, and the Martinmas goose.