"Tau Day" meaning in English

{
  "etymology_text": "By analogy with Pi Day, with 𝜏 (tau) being equivalent to 2π (6.28...)",
  "head_templates": [
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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      "examples": [
        {
          "ref": "2019 June 28, Chaim Gartenberg, Tau Day is here: celebrate tau, not pi, as the true circle:",
          "text": "But all isn’t lost for those looking for a fun day to celebrate math: Tau Day (6/28, or June 28th) is today!",
          "type": "quote"
        },
        {
          "ref": "2018 March 14, Emily Conover, Forget Pi Day. We should be celebrating Tau Day:",
          "text": "So here's to June 28th — Tau Day.",
          "type": "quote"
        },
        {
          "ref": "2010 June 28, Michael Harti, The Tau Manifesto:",
          "text": "Tau Day is a time to celebrate and rejoice in all things mathematical.",
          "type": "quote"
        }
      ],
      "glosses": [
        "June 28th, an annual celebration of the mathematical constant 𝜏 (tau)."
      ],
      "id": "en-Tau_Day-en-name-eagI3dVC",
      "links": [
        [
          "June",
          "June"
        ],
        [
          "annual",
          "annual#Adjective"
        ],
        [
          "celebration",
          "celebration"
        ],
        [
          "mathematical",
          "mathematical"
        ],
        [
          "constant",
          "constant#Noun"
        ],
        [
          "𝜏",
          "𝜏#Symbol"
        ],
        [
          "tau",
          "tau"
        ]
      ],
      "related": [
        {
          "word": "Pi Day"
        }
      ]
    }
  ],
  "word": "Tau Day"
}

{
  "etymology_text": "By analogy with Pi Day, with 𝜏 (tau) being equivalent to 2π (6.28...)",
  "head_templates": [
    {
      "args": {
        "head": "Tau Day"
      },
      "expansion": "Tau Day",
      "name": "en-proper noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "Pi Day"
    }
  ],
  "senses": [
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        "English multiword terms",
        "English proper nouns",
        "English terms with quotations",
        "English uncountable nouns",
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      "examples": [
        {
          "ref": "2019 June 28, Chaim Gartenberg, Tau Day is here: celebrate tau, not pi, as the true circle:",
          "text": "But all isn’t lost for those looking for a fun day to celebrate math: Tau Day (6/28, or June 28th) is today!",
          "type": "quote"
        },
        {
          "ref": "2018 March 14, Emily Conover, Forget Pi Day. We should be celebrating Tau Day:",
          "text": "So here's to June 28th — Tau Day.",
          "type": "quote"
        },
        {
          "ref": "2010 June 28, Michael Harti, The Tau Manifesto:",
          "text": "Tau Day is a time to celebrate and rejoice in all things mathematical.",
          "type": "quote"
        }
      ],
      "glosses": [
        "June 28th, an annual celebration of the mathematical constant 𝜏 (tau)."
      ],
      "links": [
        [
          "June",
          "June"
        ],
        [
          "annual",
          "annual#Adjective"
        ],
        [
          "celebration",
          "celebration"
        ],
        [
          "mathematical",
          "mathematical"
        ],
        [
          "constant",
          "constant#Noun"
        ],
        [
          "𝜏",
          "𝜏#Symbol"
        ],
        [
          "tau",
          "tau"
        ]
      ]
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  ],
  "word": "Tau Day"
}