1976 (MCMLXXVI) was a leap year starting on Thursday of the Gregorian calendar, the 1976th year of the Common Era (CE) and Anno Domini (AD) designations, the 976th year of the 2nd millennium, the 76th year of the 20th century, and the 7th year of the 1970s decade.

1975 (MCMLXXV) was a common year starting on Wednesday of the Gregorian calendar, the 1975th year of the Common Era (CE) and Anno Domini (AD) designations, the 975th year of the 2nd millennium, the 75th year of the 20th century, and the 6th year of the 1970s decade.