When Is Columbus Day 2024. Embassy and consulates’ air quality monitors measure airborne fine particulate matter (commonly referred to as pm 2.5 because they are less than or equal to 2.5. Columbus day in 2024 is on monday, october 14, always on the second monday in october.
Columbus day 2024 is on monday, october 14, in the united states and other countries of the americas. Columbus day is a federal holiday celebrated on the second monday of october, but some states and cities observe indigenous peoples day instead.