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| Special | Eerste uitzending |
|---|---|
| S00E01 - The Happy Days Reunion Special | 03/03/1992 |
| S00E02 - Happy Days 30th Anniversary Reunion | 03/02/2005 |
| S00E03 - The Original Pilot | Onbekend |
| S00E04 - The Happy Days 2nd Anniversary Special | 12/01/1976 |
| S00E05 - The Happy Days 3rd Anniversary Special | 04/02/1977 |
| S00E06 - The Happy Days 4th Anniversary Special | 23/03/1978 |
| S00E07 - Mork Returns: The Happy Days 5th Anniversary Special | 06/03/1979 |
| S00E08 - Love and the Happy Days | 25/02/1972 |