diff --git a/azure.datafactory.tools.psd1 b/azure.datafactory.tools.psd1
index 4fd4a53..af6b098 100644
--- a/azure.datafactory.tools.psd1
+++ b/azure.datafactory.tools.psd1
@@ -12,7 +12,7 @@
     RootModule = 'azure.datafactory.tools.psm1'
     
     # Version number of this module.
-    ModuleVersion = '1.17.0'
+    ModuleVersion = '1.17.1'
     
     # Supported PSEditions
     # CompatiblePSEditions = @()
diff --git a/changelog.md b/changelog.md
index a4cb5b7..14dce27 100644
--- a/changelog.md
+++ b/changelog.md
@@ -4,10 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [1.17.0] - 2026-07-01
+## [1.17.1] - 2026-07-01
 ### Fixed
 * Further fixes of `DeleteNotInSource` with deserialization issue #480 
 * `Publish-AdfV2FromJson` no longer silently continues after errors: config path errors (ADFT0010) and deployment failures (e.g. Azure Policy blocks) now propagate as terminating errors to the caller #472
+* Scheduled trigger recurrence times now preserve explicit timezone offsets during config-driven updates, preventing shifted deployment times #402
 
 ## [1.16.0] - 2026-06-06
 ### Fixed
diff --git a/private/ObjectProperty.ps1 b/private/ObjectProperty.ps1
index 2c7996f..010b95d 100644
--- a/private/ObjectProperty.ps1
+++ b/private/ObjectProperty.ps1
@@ -25,9 +25,14 @@ function Update-ObjectProperty {
         $exp = "`$obj.$path = `$$value"
     } elseif ($fieldType -eq [DateTime]) {
         Write-Debug "Setting as DateTime value"
-        $datevalue = [DateTime]$value
-        $utcvalue = Get-Date $datevalue -Format "yyyy-MM-ddTHH:mm:ss.fffZ"
-        $exp = "`$obj.$path = `"$utcvalue`""
+        # Keep explicit timezone suffixes unchanged to avoid timezone shifts (Issue #402).
+        if ($value -match '(?i)(Z|[+-][0-9]{2}:[0-9]{2})$') {
+            $exp = "`$obj.$path = `"$value`""
+        } else {
+            $date_value = [DateTime]$value
+            $utc_value = Get-Date $date_value -Format "yyyy-MM-ddTHH:mm:ss.fffZ"
+            $exp = "`$obj.$path = `"$utc_value`""
+        }
     } elseif ($fieldType -eq [System.Management.Automation.PSCustomObject]) {
         Write-Debug "Setting as json value"
         $jvalue = ConvertFrom-Json $value
diff --git a/test/Update-PropertiesFromFile.Tests.ps1 b/test/Update-PropertiesFromFile.Tests.ps1
index 7701999..8ebea0c 100644
--- a/test/Update-PropertiesFromFile.Tests.ps1
+++ b/test/Update-PropertiesFromFile.Tests.ps1
@@ -375,6 +375,33 @@ InModuleScope azure.datafactory.tools {
 
     }
 
+    Describe 'Update-PropertiesFromFile - Issue #402' -Tag 'Unit','private','issue402' {
+        Context 'When trigger recurrence timestamps contain explicit timezone offsets' {
+            BeforeAll {
+                $script:adf = Import-AdfFromFolder -FactoryName "xyz" -RootFolder "$RootFolder"
+                $script:adf.PublishOptions = New-AdfPublishOption
+
+                $script:configFilePath = Join-Path -Path $script:DeploymentFolder -ChildPath "config-issue-402-timezone.csv"
+                @(
+                    'type,name,path,value'
+                    'trigger,TR_RunEveryDay,"$.properties.typeProperties.recurrence.startTime","2020-06-01T23:22:11.000+10:00"'
+                    'trigger,TR_RunEveryDay,"$.properties.typeProperties.recurrence.endTime","2020-06-05T23:22:11.000+10:00"'
+                ) | Set-Content -Path $script:configFilePath -Encoding UTF8
+
+                Update-PropertiesFromFile -adf $script:adf -stage $script:configFilePath
+                $script:trigger = Get-AdfObjectByName -adf $script:adf -name "TR_RunEveryDay" -type "trigger"
+            }
+
+            It 'Should keep recurrence.startTime offset unchanged' {
+                $script:trigger.Body.properties.typeProperties.recurrence.startTime | Should -Be "2020-06-01T23:22:11.000+10:00"
+            }
+
+            It 'Should keep recurrence.endTime offset unchanged' {
+                $script:trigger.Body.properties.typeProperties.recurrence.endTime | Should -Be "2020-06-05T23:22:11.000+10:00"
+            }
+        }
+    }
+
     Describe 'Publish-AdfV2FromJson with DryRun' -Tag 'Unit','private' {
 
         $cases =  @( @{ configFile = 'config-endpoint.csv' }, @{ configFile = 'config-endpoint2.json' } )