"St. Martin's summer" meaning in English

{
  "forms": [
    {
      "form": "St. Martin's summers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "St. Martin's summer (plural St. Martin's summers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Autumn",
          "orig": "en:Autumn",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Temperature",
          "orig": "en:Temperature",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Near-synonyms: St. Luke's summer, Indian summer"
        },
        {
          "bold_text_offsets": [
            [
              284,
              303
            ]
          ],
          "ref": "1959 August 4, O. S. Nock, “British Locomotive Practice and Performance”, in Railway Magazine, page 562:",
          "text": "The results of tests with the Giesl ejector on a remarkably good general service locomotive like the \"B.R.9\" will be awaited with great interest, though so far as British Railways are concerned it would appear that the Giesl ejector has come upon the scene in what may be called the \"St. Martin's Summer\" of steam, and that its advantages may be utilised to no more than a limited extent.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A period of warm weather in early November, around the feast day of Saint Martin of Tours on the 11th."
      ],
      "id": "en-St._Martin's_summer-en-noun-EX-FJEWL",
      "links": [
        [
          "feast day",
          "feast day"
        ]
      ],
      "related": [
        {
          "word": "ice saints"
        }
      ],
      "synonyms": [
        {
          "word": "St. Luke's summer"
        },
        {
          "word": "Indian summer"
        }
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "lang_code": "fr",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "été de la Saint-Martin"
        }
      ]
    }
  ],
  "word": "St. Martin's summer"
}

{
  "forms": [
    {
      "form": "St. Martin's summers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "St. Martin's summer (plural St. Martin's summers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "ice saints"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms spelled with .",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with French translations",
        "Translation table header lacks gloss",
        "en:Autumn",
        "en:Temperature"
      ],
      "examples": [
        {
          "text": "Near-synonyms: St. Luke's summer, Indian summer"
        },
        {
          "bold_text_offsets": [
            [
              284,
              303
            ]
          ],
          "ref": "1959 August 4, O. S. Nock, “British Locomotive Practice and Performance”, in Railway Magazine, page 562:",
          "text": "The results of tests with the Giesl ejector on a remarkably good general service locomotive like the \"B.R.9\" will be awaited with great interest, though so far as British Railways are concerned it would appear that the Giesl ejector has come upon the scene in what may be called the \"St. Martin's Summer\" of steam, and that its advantages may be utilised to no more than a limited extent.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A period of warm weather in early November, around the feast day of Saint Martin of Tours on the 11th."
      ],
      "links": [
        [
          "feast day",
          "feast day"
        ]
      ],
      "synonyms": [
        {
          "word": "St. Luke's summer"
        },
        {
          "word": "Indian summer"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "lang_code": "fr",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "été de la Saint-Martin"
    }
  ],
  "word": "St. Martin's summer"
}