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Invalid Date in foreach

I don't understand why one date is good and the rest show "Invalid Date".

const blocksDate = document.querySelectorAll(".roadmap__time");
blocksDate.forEach((block) => {
  const dateString = block.innerHTML;
  const dateBlock = new Date(dateString);
  const currentDate = new Date();
  console.log(dateBlock);
});

<span class="roadmap__time">1 maja, 2022</span>
<span class="roadmap__time">16 czerwca, 2022</span>
<span class="roadmap__time">3 marca, 2022</span>
<span class="roadmap__time">3 lipca 2022</span>
<span class="roadmap__time">9 lipca 2021</span>

about 4 years ago · Juan Pablo Isaza

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Accepted Answer · 2022-07-03T00:28:45.739Z

The reason 1 mar(ca) works is that the Date.parse sees only the first 3 chars and guesses March

Here is a script that converts both ways

const months = ["STY", "LUT", "MAR", "KWIE", "MAJ", "CZE", "LIP", "SIE", "WRZ", "PAZ", "LIS", "GRU"]
const options = {
  year: "numeric",
  month: "long",
  day: "numeric"
};

const blocksDate = document.querySelectorAll(".roadmap__time");
blocksDate.forEach((block) => {
  const dateString = block.textContent;
  const [_, dd, mmm, yyyy] = dateString.match(/(\d{1,2}) (\w{3})\w+,? (\d{4})/)
  console.log(dd, mmm, yyyy)
  const dateBlock = new Date(yyyy, months.indexOf(mmm.toUpperCase()), dd, 15, 0, 0, 0);
  console.log(dateBlock);
  const plDate = dateBlock.toLocaleDateString("pl", options)
  console.log(plDate)

});

<span class="roadmap__time">1 Maja, 2022</span>
<span class="roadmap__time">16 czerwca, 2022</span>
<span class="roadmap__time">3 marca, 2022</span>
<span class="roadmap__time">3 lipca 2022</span>
<span class="roadmap__time">9 lipca 2021</span>

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Invalid Date in foreach

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Andres GPT