USA
Richie Cunningham and his friend Potsie face life at Jefferson High in Milwaukee Wisconsin in the 1950s. Lots of changes over time as kids come and go, new series spin off, Richie and pals go to college then the army. Even marriage. - IMDb
| Cool | USA |
| Días felices |  Spain |
| Días felices |  Peru |
| Días felices |  Venezuela |
| Dias Felizes |  Portugal |
| Eftyhismenes meres (transliterated title) |  Greece |
| Gänget och jag |  Sweden |
| Happy Days |  United Kingdom |
| Happy Days |  Hong Kong |
| Happy Days |  Israel |
| Happy Days |  India |
| Happy Days |  Italy |
| Happy Days |  Japan |
| Happy Days |  South Korea |
| Happy Days |  Mexico |
| Happy Days |  Netherlands |
| Happy Days |  Philippines |
| Happy Days |  United Arab Emirates |
| Happy Days |  Poland |
| Happy Days |  Singapore |
| Happy Days |  Thailand |
| Happy Days | USA |
| Happy Days |  South Africa |
| Happy Days |  Australia |
| Happy Days |  Brazil |
| Happy Days |  Canada |
| Happy Days | Canada |
| Happy Days |  West Germany |
| Happy Days |  Ecuador |
| Happy Days |  Egypt |
| Happy Days - Les jours heureux |  France |
| Les jours heureux | France |
| New Family in Town | USA |
| Onnen päivät |  Finland |
| Srećni dani |  Serbia |
| Sretni dani |  Croatia |
| Счастливые дни |  Russia |
| ハッピーデイズ | Japan |
 |
Meeno Peluce [11] | Joey (TV Episode: Potsie on His Own) (1981) |
 |
Erin Moran [14] | Joanie Cunningham / Dancing Girl (TV Episode: Fonzie's Spots) (1974) |
 |
Heather O'Rourke [7] | Heather Pfister (TV Episode: Turn Around... And You're Home) (1982) |
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Scott Baio [17] | Chachi Arcola / Newsboy (TV Episode: Fonzie's Spots) (1977) |
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Erin Blunt [14] | Wilbur (TV Episode: Spunky Come Home) (1977) |
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Clint Howard [17] | Donald 'Junior' Hedges Jr. / Moose (TV Episode: Bringing Up Spike) (1976) |
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Sparky Marcus [13] | Billy (TV Episode: The Hucksters) (1980) |
 |
Kristoff St. John [10] | Booker Brown (TV Episode: Football Frolics) (1976) |
 |
Bo Sharon | Richie Cunningham Jr. (TV Episode: Welcome Home: Part 2) (1983) |
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Cindy Eilbacher [16] | Betty Wilkens (TV Episode: The Lemon) (1974) |
