<Tr> <Th> Observed by </Th> <Td> United States </Td> </Tr> <Tr> <Th> Type </Th> <Td> National </Td> </Tr> <Tr> <Th> Celebrations </Th> <Td> Parades, barbecues </Td> </Tr> <Tr> <Th> Date </Th> <Td> First Monday in September </Td> </Tr>

When did labor day become a legal holiday in illinois