Fund: List of unsupported date strings

Summary

All of the following date strings are parsed by Chrome and Firefox and produce the same time value in both browsers (even though sometimes the value can be unexpected). All of them are currently unsupported by Ladybird. I'm not sure how many of them we want to support for compatibility, but I figured it's better to have a list just in case

Saturday, October 12, 2024
12 October 2024 3:30 PM
12.10.2024
12.10.24
12 octobre 2024
12-OCT-2024
2024.10.12
10/12/24 3:30:00 PM
2024-10-12 3:30:00 PM
2024-10-12 15:30:00.000 +0000
Fri, 11 Oct 2024 22:18:51 GMT+00:00
Fri, 11 Oct 2024 22:18:51 GMT+23:59
Sat Oct 12 2024 22:18:51 GMT+00:00
Fri/11/Oct/2024 22:18:51 UTC
11.Oct.2024.22:18:51 UTC
Sat, 12-Oct-2024 15:30:00 PST
22:18:51 2024
Saturday (Oct 12) 2024
0000000
100000

Operating system

Linux

Steps to reproduce

N/A

Expected behavior

N/A

Actual behavior

N/A

URL for a reduced test case

N/A

HTML/SVG/etc. source for a reduced test case

<body>
  <script>
    // Note that following values are expected in GMT+1
    const dates = [
      ["12 October 2024 3:30 PM", 1728739800000],
      ["12.10.2024", 1733785200000],
      ["12-10-2024", 1733785200000],
      ["12.10.24", 1733785200000],
      ["12 octobre 2024", 1728684000000],
      ["12-OCT-2024", 1728684000000],
      ["2024/10/12", 1728684000000],
      ["2024.10.12", 1728684000000],
      ["10-12-24", 1728684000000],
      ["10/12/24 3:30:00 PM", 1728739800000],
      ["10/12/2024, 12:20:39 AM", 1728685239000],
      ["2024-10-12 3:30:00 PM", 1728739800000],
      ["2024-10-12 15:30:00.000 +0000", 1728747000000],
      ["Fri, 11 Oct 2024 22:18:51 GMT+00:00", 1728685131000],
      ["Fri, 11 Oct 2024 22:18:51 GMT+23:59", 1728598791000],
      ["Sat Oct 12 2024 22:18:51 GMT+00:00", 1728771531000],
      ["Fri/11/Oct/2024 22:18:51 UTC", 1728685131000],
      ["11.Oct.2024.22:18:51 UTC", 1728685131000],
      ["Sat, 12-Oct-2024 15:30:00 PST", 1728775800000],

      // How are these even valid
      ["22:18:51 2024", 1704143931000],
      ["0000000", 946681200000],
      ["100000", 3093527977200000],
      ["Saturday, October 12, 2024", 1728684000000],
      ["Saturday (Oct 12) 2024", 1704063600000],
    ];

    const log = (str) => document.body.appendChild(document.createElement("pre")).textContent = str;

    dates.forEach(([dateString, time]) => {
      const d = new Date(dateString);
      const t = d?.getTime();

      if (t !== time) {
        if (Number.isNaN(t)) {
            log(`Unsupported: ${dateString}`);
        } else {
            log(`String was parsed, but time is incorrect: ${dateString} -> ${t} (expected: ${time})`);
        }
      }
    });
  </script>
</body>

Log output and (if possible) backtrace

N/A

Screenshots or screen recordings

No response

Build flags or config settings

No response

Contribute a patch?

I’ll contribute a patch for this myself.

Ladybird/ladybird

List of unsupported date strings

Summary

Operating system

Steps to reproduce

Expected behavior

Actual behavior

URL for a reduced test case

HTML/SVG/etc. source for a reduced test case

Log output and (if possible) backtrace

Screenshots or screen recordings

Build flags or config settings

Contribute a patch?

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Backer

Contributor

Maintainer

Ladybird/ladybird

List of unsupported date strings

Summary

Operating system

Steps to reproduce

Expected behavior

Actual behavior

URL for a reduced test case

HTML/SVG/etc. source for a reduced test case

Log output and (if possible) backtrace

Screenshots or screen recordings

Build flags or config settings

Contribute a patch?

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