"ei yksi pääsky kesää tee" meaning in Finnish

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "grc",
        "3": "μία χελιδὼν ἔαρ οὐ ποιεῖ"
      },
      "expansion": "Calque of Ancient Greek μία χελιδὼν ἔαρ οὐ ποιεῖ (mía khelidṑn éar ou poieî)",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of Ancient Greek μία χελιδὼν ἔαρ οὐ ποιεῖ (mía khelidṑn éar ou poieî).",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "proverb",
        "head": "ei yksi pääsky kesää tee"
      },
      "expansion": "ei yksi pääsky kesää tee",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "proverb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Finnish proverbs",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "one swallow does not a summer make"
      ],
      "id": "en-ei_yksi_pääsky_kesää_tee-fi-proverb-P-5rXwRC",
      "links": [
        [
          "one swallow does not a summer make",
          "one swallow does not a summer make"
        ]
      ]
    }
  ],
  "word": "ei yksi pääsky kesää tee"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "grc",
        "3": "μία χελιδὼν ἔαρ οὐ ποιεῖ"
      },
      "expansion": "Calque of Ancient Greek μία χελιδὼν ἔαρ οὐ ποιεῖ (mía khelidṑn éar ou poieî)",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of Ancient Greek μία χελιδὼν ἔαρ οὐ ποιεῖ (mía khelidṑn éar ou poieî).",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "proverb",
        "head": "ei yksi pääsky kesää tee"
      },
      "expansion": "ei yksi pääsky kesää tee",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "proverb",
  "senses": [
    {
      "categories": [
        "Finnish entries with incorrect language header",
        "Finnish lemmas",
        "Finnish multiword terms",
        "Finnish proverbs",
        "Finnish terms calqued from Ancient Greek",
        "Finnish terms derived from Ancient Greek"
      ],
      "glosses": [
        "one swallow does not a summer make"
      ],
      "links": [
        [
          "one swallow does not a summer make",
          "one swallow does not a summer make"
        ]
      ]
    }
  ],
  "word": "ei yksi pääsky kesää tee"
}