1977 (MCMLXXVII) was a common year starting on Saturday of the Gregorian calendar, the 1977th year of the Common Era (CE) and Anno Domini (AD) designations, the 977th year of the 2nd millennium, the 77th year of the 20th century, and the 8th year of the 1970s decade.

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.