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bcquality/community/knowledge/appsource/use-invariant-date-literals.md
Stefano Demiliani 45ac371e7a
Add AL-focused AppSource validation guidance (#142) 
* knowledge(appsource): add AL validation guidance

* Address Marketplace review feedback

* Address remaining Marketplace review feedback

* Align AppSource review applicability outcome
2026-09-14 12:42:45 +02:00

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bc-version domain keywords technologies countries application-area
all
appsource
date-literal
invariant-date
dateformula
localization
appsourcecop
al
w1
all

Use invariant date literals

Description

Write fixed dates in AL with the invariant yyyymmddD syntax. A locale-dependent text value parsed with Evaluate can change meaning or fail under another user's regional settings, which makes the Marketplace extension unreliable across markets.

Best Practice

Represent a fixed date directly as an AL date literal, such as 20250131D. Use CalcDate with a date formula when the value is relative rather than fixed.

See sample: use-invariant-date-literals.good.al.

Anti Pattern

Building a fixed date by passing localized text such as 01/02/2025 to Evaluate. Detection signal: Evaluate converting a hard-coded or label-backed formatted string into a Date.

See sample: use-invariant-date-literals.bad.al.