"happy days" meaning in English

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        "head": "happy days"
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      "expansion": "happy days",
      "name": "en-interj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
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          "parents": [],
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          "source": "w"
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      "examples": [
        {
          "ref": "2016, Mattie Turnbull, Days of Apprehension and Adventure, page 106:",
          "text": "Imagine having five servants upstairs. Oh happy days.",
          "type": "quote"
        },
        {
          "ref": "2023 June 28, Anthony Smith talks to Paul Clifton, “The industry has to go back to basics”, in RAIL, number 986, page 40:",
          "text": "The current Secretary of State likes to see statistics. We have lots of statistics. Happy days!",
          "type": "quote"
        }
      ],
      "glosses": [
        "An exclamation which expresses satisfaction."
      ],
      "id": "en-happy_days-en-intj-d8U0t1IM",
      "links": [
        [
          "exclamation",
          "exclamation#English"
        ],
        [
          "express",
          "express#English"
        ],
        [
          "satisfaction",
          "satisfaction#English"
        ]
      ],
      "raw_glosses": [
        "(British, Ireland) An exclamation which expresses satisfaction."
      ],
      "tags": [
        "British",
        "Ireland"
      ]
    }
  ],
  "word": "happy days"
}

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    {
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        "head": "happy days"
      },
      "expansion": "happy days",
      "name": "en-interj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
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      "examples": [
        {
          "ref": "2016, Mattie Turnbull, Days of Apprehension and Adventure, page 106:",
          "text": "Imagine having five servants upstairs. Oh happy days.",
          "type": "quote"
        },
        {
          "ref": "2023 June 28, Anthony Smith talks to Paul Clifton, “The industry has to go back to basics”, in RAIL, number 986, page 40:",
          "text": "The current Secretary of State likes to see statistics. We have lots of statistics. Happy days!",
          "type": "quote"
        }
      ],
      "glosses": [
        "An exclamation which expresses satisfaction."
      ],
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          "exclamation",
          "exclamation#English"
        ],
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          "express",
          "express#English"
        ],
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          "satisfaction",
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        ]
      ],
      "raw_glosses": [
        "(British, Ireland) An exclamation which expresses satisfaction."
      ],
      "tags": [
        "British",
        "Ireland"
      ]
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  ],
  "word": "happy days"
}