[pickers] Date picker bug with disablePast

[stephenwade]

Steps to reproduce

Link to live example: https://codesandbox.io/p/sandbox/twilight-paper-kgh5c9

1. Add the disablePast attribute to the date picker.
2. Set the date to next year, but less than 1 year from now (for example: March 6, 2025).
3. Set the year back to the current year.

Current behavior

The typical behavior is to keep the time component the same. After following the above steps, the time component will be reset to 00:00:00.

Expected behavior

The time component should not change.

Context

The date picker is modifying a date with a time component of 23:59:59. In most cases, the result after the date picker still has a time of 23:59:59, but in this case the time is reset to 00:00:00.

Your environment

npx @mui/envinfo

I used Google Chrome.

  System:
    OS: macOS 14.3.1
  Binaries:
    Node: 18.19.1 - /opt/homebrew/bin/node
    npm: 10.2.4 - /opt/homebrew/bin/npm
    pnpm: 8.15.3 - /opt/homebrew/bin/pnpm
  Browsers:
    Chrome: 122.0.6261.112
    Edge: Not Found
    Safari: 17.3.1

Search keywords: date picker disablePast

[flaviendelangle]

Hi,
Thanks for your contribution

This dateOnly does not exist on our component, where did you see it?

[LukasTy]

Confirming that this is a problem with the pickers behavior.
If there is already a present date, we shouldn't reset it, but use its time when changing the day.

[stephenwade]

I apologize for the confusion, dateOnly was a prop in our internal date picker component to choose between DesktopDatePicker and DesktopDateTimePicker. I've removed the references in the title and demo.

[github-actions]

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