diff --git a/modules/swagger-codegen/src/main/resources/swift/Models.mustache b/modules/swagger-codegen/src/main/resources/swift/Models.mustache
index 2d7c9094091..b91e2727b8a 100644
--- a/modules/swagger-codegen/src/main/resources/swift/Models.mustache
+++ b/modules/swagger-codegen/src/main/resources/swift/Models.mustache
@@ -121,6 +121,7 @@ class Decoders {
                 "yyyy-MM-dd'T'HH:mm:ss.SSS"
             ].map { (format: String) -> NSDateFormatter in
                 let formatter = NSDateFormatter()
+                formatter.locale = NSLocale(localeIdentifier:"en_US_POSIX")
                 formatter.dateFormat = format
                 return formatter
             }
diff --git a/samples/client/petstore/swift/default/PetstoreClient/Classes/Swaggers/Models.swift b/samples/client/petstore/swift/default/PetstoreClient/Classes/Swaggers/Models.swift
index 32175b605a3..2748ba3db2d 100644
--- a/samples/client/petstore/swift/default/PetstoreClient/Classes/Swaggers/Models.swift
+++ b/samples/client/petstore/swift/default/PetstoreClient/Classes/Swaggers/Models.swift
@@ -121,6 +121,7 @@ class Decoders {
                 "yyyy-MM-dd'T'HH:mm:ss.SSS"
             ].map { (format: String) -> NSDateFormatter in
                 let formatter = NSDateFormatter()
+                formatter.locale = NSLocale(localeIdentifier:"en_US_POSIX")
                 formatter.dateFormat = format
                 return formatter
             }
diff --git a/samples/client/petstore/swift/promisekit/PetstoreClient/Classes/Swaggers/Models.swift b/samples/client/petstore/swift/promisekit/PetstoreClient/Classes/Swaggers/Models.swift
index 32175b605a3..2748ba3db2d 100644
--- a/samples/client/petstore/swift/promisekit/PetstoreClient/Classes/Swaggers/Models.swift
+++ b/samples/client/petstore/swift/promisekit/PetstoreClient/Classes/Swaggers/Models.swift
@@ -121,6 +121,7 @@ class Decoders {
                 "yyyy-MM-dd'T'HH:mm:ss.SSS"
             ].map { (format: String) -> NSDateFormatter in
                 let formatter = NSDateFormatter()
+                formatter.locale = NSLocale(localeIdentifier:"en_US_POSIX")
                 formatter.dateFormat = format
                 return formatter
             }
diff --git a/samples/client/petstore/swift/rxswift/PetstoreClient/Classes/Swaggers/Models.swift b/samples/client/petstore/swift/rxswift/PetstoreClient/Classes/Swaggers/Models.swift
index 32175b605a3..2748ba3db2d 100644
--- a/samples/client/petstore/swift/rxswift/PetstoreClient/Classes/Swaggers/Models.swift
+++ b/samples/client/petstore/swift/rxswift/PetstoreClient/Classes/Swaggers/Models.swift
@@ -121,6 +121,7 @@ class Decoders {
                 "yyyy-MM-dd'T'HH:mm:ss.SSS"
             ].map { (format: String) -> NSDateFormatter in
                 let formatter = NSDateFormatter()
+                formatter.locale = NSLocale(localeIdentifier:"en_US_POSIX")
                 formatter.dateFormat = format
                 return formatter
             }