"13th Gen" meaning in English

{
  "etymology_text": "Coined by William Strauss and Neil Howe, from being the 13th generation since American independence according to their analysis of generational cycles in the US.",
  "head_templates": [
    {
      "args": {},
      "expansion": "13th Gen",
      "name": "en-proper-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English quotations with omitted translation",
          "parents": [
            "Quotations with omitted translation",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Age",
          "orig": "en:Age",
          "parents": [
            "Human",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Collectives",
          "orig": "en:Collectives",
          "parents": [
            "Miscellaneous",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Generations",
          "orig": "en:Generations",
          "parents": [
            "Age",
            "Collectives",
            "Demography",
            "People",
            "Sociology",
            "Human",
            "Time",
            "Miscellaneous",
            "Sciences",
            "Statistics",
            "Social sciences",
            "All topics",
            "Formal sciences",
            "Mathematics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of Generation X"
      ],
      "id": "en-13th_Gen-en-name-CHyEuNb5",
      "links": [
        [
          "Generation X",
          "Generation X#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Synonym of Generation X"
      ],
      "related": [
        {
          "word": "13er"
        },
        {
          "word": "thirteener"
        }
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Generation X"
        }
      ],
      "tags": [
        "dated"
      ],
      "wikipedia": [
        "Neil Howe",
        "William Strauss"
      ]
    }
  ],
  "word": "13th Gen"
}

{
  "etymology_text": "Coined by William Strauss and Neil Howe, from being the 13th generation since American independence according to their analysis of generational cycles in the US.",
  "head_templates": [
    {
      "args": {},
      "expansion": "13th Gen",
      "name": "en-proper-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "13er"
    },
    {
      "word": "thirteener"
    }
  ],
  "senses": [
    {
      "categories": [
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English quotations with omitted translation",
        "English terms spelled with numbers",
        "English terms with quotations",
        "English uncountable nouns",
        "en:Age",
        "en:Collectives",
        "en:Generations"
      ],
      "glosses": [
        "Synonym of Generation X"
      ],
      "links": [
        [
          "Generation X",
          "Generation X#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Synonym of Generation X"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Generation X"
        }
      ],
      "tags": [
        "dated"
      ],
      "wikipedia": [
        "Neil Howe",
        "William Strauss"
      ]
    }
  ],
  "word": "13th Gen"
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <timeline> - omitted",
  "path": [
    "13th Gen",
    "timeline:generations",
    "#tag",
    "#tag"
  ],
  "section": "English",
  "subsection": "proper noun",
  "title": "13th Gen",
  "trace": ""
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <timeline> - omitted",
  "path": [
    "13th Gen",
    "timeline:generations",
    "#tag",
    "#tag"
  ],
  "section": "English",
  "subsection": "proper noun",
  "title": "13th Gen",
  "trace": ""
}