"Pioneer Day" meaning in English

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      "glosses": [
        "A Utah state holiday celebrating the arrival of Mormon pioneers in what became Salt Lake City, Utah, in 1847."
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        "(US) A Utah state holiday celebrating the arrival of Mormon pioneers in what became Salt Lake City, Utah, in 1847."
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        {
          "word": "Pioneers' Day"
        }
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          "lang": "Russian",
          "roman": "denʹ pionerov",
          "sense": "Utah state holiday celebrating the arrival of Mormon pioneers in what would become Salt Lake City",
          "tags": [
            "masculine"
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          "word": "день пионеров"
        }
      ],
      "wikipedia": [
        "Pioneer Day (Utah)"
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  "word": "Pioneer Day"
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  "synonyms": [
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      "word": "Pioneers' Day"
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      "roman": "denʹ pionerov",
      "sense": "Utah state holiday celebrating the arrival of Mormon pioneers in what would become Salt Lake City",
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        "masculine"
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      "word": "день пионеров"
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