EuiDatePicker input direct edit of date guesses timezone

[marsh73]

Describe the bug
When using DatePicker with UTC date, If I select a time change from the dropdown it behaves as expected, but when I edit the date directly, it automatically adjusts the date to UTC in the dropdown, then in the actual date, once I click away. This feels like a bug. If it were deliberate i would expect that the same adjustment would be made when selecting a time from the dropdown.

it seems to assume when selecting from the dropdown that I know what I'm doing, but when manually entering the time, it has to make an adjustment for me. I went to your storybook examples for the utcOffset to see if it was my code or the component itself.

if you go here https://eui.elastic.co/#/forms/date-picker#utc-offsets
select a time from the dropdown
you'll see the time behaves as expected
manually update the time by 1 minute
you will see that when you click away it adjusts the hours to account for the offset.
this is a confusing behavior

Impact and severity
It's a confusing UX that can make it hard to create an exact search

Environment and versions
bypassing this as you can recreate in your current storybook in your docs

To Reproduce
Steps to reproduce the behavior:

1. go here https://eui.elastic.co/#/forms/date-picker#utc-offsets
2. select a time from the dropdown => you'll see the time behaves as expected
3. manually update the time by 1 minute => you will see that when you click away it adjusts the hours to account for the offset.

this is a confusing behavior

Expected behavior
editing the time input manually would behave as selecting a time input from the list... what i see, is what persists

Minimum reproducible sandbox
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Screenshots
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Additional context
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[github-actions]

👋 Thank you for your suggestion or request! While the EUI team agrees that it's valid, it's unlikely that we will prioritize this issue on our roadmap. We'll leave the issue open if you or anyone else in the community wants to implement it by contributing to EUI. If not, this issue will auto close in one year.

Log | Bot Usage

[JasonStoltz]

Hey @marsh73, thank you for the bug report. Since we're not really using these UTC offsets in Elastic products, we decided that we're not going to prioritize a fix at this time. However, we are always super grateful for community PRs.

[marsh73]

Thank you... if i can find a solution I'll submit a PR

[cee-chen]

This is a dupe of #3461 - track that issue instead for UTC offset support.