Fixes #13116 - Update UFormat differences btw PS and Unix

[sdwheeler]

PR Summary

Update UFormat differences btw PS and Unix

• Fixes AB#592974
• Fixes Disambiguation needed Get-date %V and %W Uformat specifier #13116
• Fixes Missing warning for Uformat %V #13117

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributor's guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

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[Copilot]

Pull request overview

Updates the Get-Date documentation to better describe differences between PowerShell -UFormat behavior and Unix strftime-style equivalents, with emphasis on week-number specifiers.

Changes:

• Updates ms.date metadata across affected Get-Date.md versions.
• Replaces the PowerShell 7.x -UFormat %s note with an example describing %W week-number differences between Unix and PowerShell.
• Expands the Windows PowerShell (5.1) note to be broader than %s and to call out ISO 8601 inconsistencies.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
reference/7.7/Microsoft.PowerShell.Utility/Get-Date.md	Updates ms.date and replaces the prior %s note with a %W Unix-vs-PowerShell comparison note.
reference/7.6/Microsoft.PowerShell.Utility/Get-Date.md	Same as 7.7: metadata update + %W Unix-vs-PowerShell comparison note.
reference/7.5/Microsoft.PowerShell.Utility/Get-Date.md	Same as 7.7: metadata update + %W Unix-vs-PowerShell comparison note.
reference/7.4/Microsoft.PowerShell.Utility/Get-Date.md	Same as 7.7: metadata update + %W Unix-vs-PowerShell comparison note.
reference/5.1/Microsoft.PowerShell.Utility/Get-Date.md	Updates ms.date and broadens the note to cover multiple specifiers and ISO 8601 inconsistencies.

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[learn-build-service-prod]

Learn Build status updates of commit fb44ff1:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.6)
reference/7.7/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.7)

For more details, please refer to the build report.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit 5de287d:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.6)
reference/7.7/Microsoft.PowerShell.Utility/Get-Date.md	✅Succeeded	View (powershell-7.7)

For more details, please refer to the build report.