Holidays:
1920 3 days' holiday (without pay) 
1931 6 days' holiday (with pay) 
1938 14 days' holiday 
1952 3 weeks' holiday 
1972 3 weeks' holiday + 3 days 
1973 4 weeks' holiday 
1979 5 weeks' holiday 
2003 5 weeks holiday + 5 days

Weekly working hours:
1920 48 hours 
1959 45 hours 
1966 44 hours 
1968 42 1/2 hours 
1970 41 3/4 hours 
1974 40 hours 
1986 39 hours 
1987 38 1/2 hours 
1988 38 hours 
1989 37 1/2 hours 
1990 37 hours

Political/union milestones:
1978 Danish Equal Treatment Act 
1976 Danish Equal Pay Act 
1975 Danish Working Environment Act 
1973 Denmark member of the EC/EU 
1973 Danish Industrial Court Act 
1971 Economic Democracy 
1968 Management and cooperation 
1966 Sick pay scheme 
1967 Red LO (Danish Federation of Trade Unions) report (Economic Democracy) 
1956 Old age pension 
1947 First cooperation committee agreement 
1938 Danish Holidays with Pay Act 
1924 First Social Democratic Government 
1920 8 hours' working day 
1912 Formation of the Central Organization of Danish Metal Workers, now the Central Organization of Industrial Employees in Denmark (CO-industri) 
1910 2nd International's Congress in Copenhagen 
1901 The victory of the principle of Cabinet responsibility and the consequent change of the Danish political system 
1899 September Agreement 
1878 Social Democratic Party 
1873 First collective agreement 
1870 Birth of the trade union 
1849 Political democracy (the Constitution)