---
id: object/interface/retention-period
type: object
title: Interface "Retention Period"
summary: Interface "Retention Period" in System Application (System.DataAdministration). 5 public procedures. Present since at least BC23, still in BC30.
tier: official
language: en
tags:
  - interface
  - system application
versions:
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  last_changed: null
  deprecated: null
review:
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  at: "2026-10-11T00:31:51.816Z"
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evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/System%20Application/App/Retention%20Policy/src/Retention%20Period/RetentionPeriod.Interface.al
    title: src/System Application/App/Retention Policy/src/Retention Period/RetentionPeriod.Interface.al (releases/29.x)
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object_type: interface
object_id: null
name: Retention Period
namespace: System.DataAdministration
app: System Application
extends: null
first_version: "23"
last_version: "30"
present_in:
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  - "24"
  - "25"
  - "26"
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  - "28"
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
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counts:
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  procedures: 5
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---

# Interface "Retention Period"

> Interface "Retention Period" in System Application (System.DataAdministration). 5 public procedures. Present since at least BC23, still in BC30.

System Application · System.DataAdministration · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/System%20Application/App/Retention%20Policy/src/Retention%20Period/RetentionPeriod.Interface.al) · facts from BC29

## Procedures

- `RetentionPeriodDateFormula(RetentionPeriod: Record "Retention Period"): Text`
- `RetentionPeriodDateFormula(RetentionPeriod: Record "Retention Period"; Translated: Boolean): Text`: Returns the date formula for a given retention period.
- `CalculateExpirationDate(RetentionPeriod: Record "Retention Period"): Date`: Returns the expiration date for a given retention period.
- `CalculateExpirationDate(RetentionPeriod: Record "Retention Period"; UseDate: Date): Date`: Returns the expiration date for a given retention period.
- `CalculateExpirationDate(RetentionPeriod: Record "Retention Period"; UseDateTime: DateTime): DateTime`: Returns the expiration date and time for a given retention period.

## Implemented by

- [Codeunit 3900 "Retention Period Impl."](../codeunit/3900.md)
- [Codeunit 3901 "Retention Period Custom Impl."](../codeunit/3901.md)
- [Enum 3900 "Retention Period Enum"](../enum/3900.md)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "interface", object_name: "Retention Period")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.