Question: Mashujaa Day is observed on 20 October commemorates the detention of freemdom fighters including the country's first what?
Sentence (from "German-American Day"): Originally known under the rubric of "German Day", the holiday was celebrated for the first time in Philadelphia in 1883, on the occasion of the 200th anniversary of the arrival of the settlers from Krefeld; and similar celebrations developed later in other parts of the country.
Relevant evidence: No