diff --git a/src/Console/DacapoCommand.php b/src/Console/DacapoCommand.php
index a93444df..9f982478 100644
--- a/src/Console/DacapoCommand.php
+++ b/src/Console/DacapoCommand.php
@@ -2,8 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Console;
 
-use DateTime;
-use Exception;
 use Illuminate\Console\ConfirmableTrait;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Console\DacapoCommandUseCase;
 
@@ -24,7 +22,6 @@ class DacapoCommand extends Command
         {--no-migrate : Do not migrate}
         {--seed : Seed the database with records}
         {--refresh : Migrate refresh (for debug)}
-        {--prefix=1970-01-01 : Prefix date of the output migration file}
     ';
 
     /**
@@ -54,15 +51,7 @@ public function handle(): void
     {
         $this->call('dacapo:clear', ['--force' => true]);
 
-        try {
-            $prefixDate = new DateTime($this->option('prefix'));
-        } catch (Exception $exception) {
-            $this->error('Error: Set the --prefix option to a value that can be converted to a date type.');
-
-            return;
-        }
-
-        $fileList = $this->useCase->handle($prefixDate);
+        $fileList = $this->useCase->handle();
 
         foreach ($fileList as $file) {
             $this->line(sprintf('<fg=green>Generated:</> %s', $file->getName()));
diff --git a/src/Dacapo/UseCase/Console/DacapoCommandUseCase.php b/src/Dacapo/UseCase/Console/DacapoCommandUseCase.php
index 67d73281..44bc74f0 100644
--- a/src/Dacapo/UseCase/Console/DacapoCommandUseCase.php
+++ b/src/Dacapo/UseCase/Console/DacapoCommandUseCase.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\UseCase\Console;
 
-use DateTime;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFileList;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Generator\MigrationGenerator;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Port\SchemaListRepository;
@@ -24,11 +23,10 @@ public function __construct(SchemaListRepository $repository, MigrationGenerator
     }
 
     /**
-     * @param DateTime $prefixDate
      * @return MigrationFileList
      */
-    public function handle(DateTime $prefixDate): MigrationFileList
+    public function handle(): MigrationFileList
     {
-        return $this->generator->generate($prefixDate, $this->repository->get());
+        return $this->generator->generate($this->repository->get());
     }
 }
diff --git a/src/Dacapo/UseCase/Converter/SchemaToConstraintForeignKeyMigrationConverter.php b/src/Dacapo/UseCase/Converter/SchemaToConstraintForeignKeyMigrationConverter.php
index 2153666e..54ad39bc 100644
--- a/src/Dacapo/UseCase/Converter/SchemaToConstraintForeignKeyMigrationConverter.php
+++ b/src/Dacapo/UseCase/Converter/SchemaToConstraintForeignKeyMigrationConverter.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\UseCase\Converter;
 
-use DateTime;
 use Illuminate\Support\Str;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\Schema;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\SchemaList;
@@ -12,16 +11,7 @@
 class SchemaToConstraintForeignKeyMigrationConverter
 {
     const MIGRATION_COLUMN_INDENT = '            ';
-    protected DateTime $prefixDate;
-
-    /**
-     * SchemaToConstraintForeignKeyMigrationConverter constructor.
-     * @param DateTime $prefixDate
-     */
-    public function __construct(DateTime $prefixDate)
-    {
-        $this->prefixDate = $prefixDate;
-    }
+    protected Schema $schema;
 
     /**
      * @param SchemaList $schemaList
@@ -40,17 +30,6 @@ public function convertList(SchemaList $schemaList): MigrationFileList
         return $fileList;
     }
 
-    /**
-     * @param DateTime $prefixDate
-     * @return $this
-     */
-    public function setPrefixDate(DateTime $prefixDate): self
-    {
-        $this->prefixDate = $prefixDate;
-
-        return $this;
-    }
-
     /**
      * @param Schema $schema
      * @return MigrationFile
@@ -66,7 +45,7 @@ public function convert(Schema $schema): MigrationFile
      */
     protected function makeMigrationFileName(Schema $schema): string
     {
-        return sprintf('%s_000003_%s.php', $this->prefixDate->format('Y_m_d'), $this->makeMigrationName($schema));
+        return sprintf('1970_01_01_000003_%s.php', $this->makeMigrationName($schema));
     }
 
     /**
diff --git a/src/Dacapo/UseCase/Converter/SchemaToCreateIndexMigrationConverter.php b/src/Dacapo/UseCase/Converter/SchemaToCreateIndexMigrationConverter.php
index 55ea041e..256d7b4d 100644
--- a/src/Dacapo/UseCase/Converter/SchemaToCreateIndexMigrationConverter.php
+++ b/src/Dacapo/UseCase/Converter/SchemaToCreateIndexMigrationConverter.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\UseCase\Converter;
 
-use DateTime;
 use Illuminate\Support\Str;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\Schema;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\SchemaList;
@@ -12,27 +11,7 @@
 class SchemaToCreateIndexMigrationConverter
 {
     const MIGRATION_COLUMN_INDENT = '            ';
-    protected DateTime $prefixDate;
-
-    /**
-     * SchemaToCreateIndexMigrationConverter constructor.
-     * @param DateTime $prefixDate
-     */
-    public function __construct(DateTime $prefixDate)
-    {
-        $this->prefixDate = $prefixDate;
-    }
-
-    /**
-     * @param DateTime $prefixDate
-     * @return $this
-     */
-    public function setPrefixDate(DateTime $prefixDate): self
-    {
-        $this->prefixDate = $prefixDate;
-
-        return $this;
-    }
+    protected Schema $schema;
 
     /**
      * @param SchemaList $schemaList
@@ -66,7 +45,7 @@ public function convert(Schema $schema): MigrationFile
      */
     protected function makeMigrationFileName(Schema $schema): string
     {
-        return sprintf('%s_000002_%s.php', $this->prefixDate->format('Y_m_d'), $this->makeMigrationName($schema));
+        return sprintf('1970_01_01_000002_%s.php', $this->makeMigrationName($schema));
     }
 
     /**
diff --git a/src/Dacapo/UseCase/Converter/SchemaToCreateTableMigrationConverter.php b/src/Dacapo/UseCase/Converter/SchemaToCreateTableMigrationConverter.php
index 501b4613..60fea0a6 100644
--- a/src/Dacapo/UseCase/Converter/SchemaToCreateTableMigrationConverter.php
+++ b/src/Dacapo/UseCase/Converter/SchemaToCreateTableMigrationConverter.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\UseCase\Converter;
 
-use DateTime;
 use Illuminate\Support\Str;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\Schema;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\SchemaList;
@@ -15,28 +14,10 @@ class SchemaToCreateTableMigrationConverter
     const MIGRATION_COLUMN_INDENT = '            ';
 
     protected DatabaseBuilder $databaseBuilder;
-    protected DateTime $prefixDate;
 
-    /**
-     * SchemaToCreateTableMigrationConverter constructor.
-     * @param DatabaseBuilder $databaseBuilder
-     * @param DateTime $prefixDate
-     */
-    public function __construct(DatabaseBuilder $databaseBuilder, DateTime $prefixDate)
+    public function __construct(DatabaseBuilder $databaseBuilder)
     {
         $this->databaseBuilder = $databaseBuilder;
-        $this->prefixDate = $prefixDate;
-    }
-
-    /**
-     * @param DateTime $prefixDate
-     * @return $this
-     */
-    public function setPrefixDate(DateTime $prefixDate): self
-    {
-        $this->prefixDate = $prefixDate;
-
-        return $this;
     }
 
     /**
@@ -71,7 +52,7 @@ public function convert(Schema $schema): MigrationFile
      */
     protected function makeMigrationFileName(Schema $schema): string
     {
-        return sprintf('%s_000001_%s.php', $this->prefixDate->format('Y_m_d'), $this->makeMigrationName($schema));
+        return sprintf('1970_01_01_000001_%s.php', $this->makeMigrationName($schema));
     }
 
     /**
diff --git a/src/Dacapo/UseCase/Generator/MigrationGenerator.php b/src/Dacapo/UseCase/Generator/MigrationGenerator.php
index 321a7a20..c8a319a2 100644
--- a/src/Dacapo/UseCase/Generator/MigrationGenerator.php
+++ b/src/Dacapo/UseCase/Generator/MigrationGenerator.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\UseCase\Generator;
 
-use DateTime;
 use UcanLab\LaravelDacapo\Dacapo\Domain\Entity\SchemaList;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFileList;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Converter\SchemaToConstraintForeignKeyMigrationConverter;
@@ -37,16 +36,11 @@ public function __construct(
     }
 
     /**
-     * @param DateTime $prefixDate
      * @param SchemaList $schemaList
      * @return MigrationFileList
      */
-    public function generate(DateTime $prefixDate, SchemaList $schemaList): MigrationFileList
+    public function generate(SchemaList $schemaList): MigrationFileList
     {
-        $this->schemaToCreateTableMigrationConverter->setPrefixDate($prefixDate);
-        $this->schemaToCreateIndexMigrationConverter->setPrefixDate($prefixDate);
-        $this->schemaToConstraintForeignKeyMigrationConverter->setPrefixDate($prefixDate);
-
         $tableFileList = $this->generateCreateTable($schemaList);
         $indexFileList = $this->generateCreateIndex($schemaList);
         $foreignKeyFileList = $this->generateConstraintForeignKey($schemaList);
diff --git a/tests/Console/DacapoClearCommandTest.php b/tests/Console/DacapoClearCommandTest.php
index 61019b22..fdd47fe5 100644
--- a/tests/Console/DacapoClearCommandTest.php
+++ b/tests/Console/DacapoClearCommandTest.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Test\App\UseCase\Console;
 
-use DateTime;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFile;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFileList;
 use UcanLab\LaravelDacapo\Dacapo\Infra\Adapter\InMemoryMigrationListRepository;
@@ -15,7 +14,6 @@ class DacapoClearCommandTest extends TestCase
     public function testResolve(): void
     {
         $this->app->register(ConsoleServiceProvider::class);
-        $this->instance(DateTime::class, new DateTime());
         $this->instance(MigrationListRepository::class, new InMemoryMigrationListRepository(new MigrationFileList([
             new MigrationFile('1970_01_01_000000_create_users_table.php', ''),
             new MigrationFile('1970_01_01_000000_create_password_resets_table.php', ''),
diff --git a/tests/Console/DacapoCommandTest.php b/tests/Console/DacapoCommandTest.php
index 2228c735..18857a08 100644
--- a/tests/Console/DacapoCommandTest.php
+++ b/tests/Console/DacapoCommandTest.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Test\App\UseCase\Console;
 
-use DateTime;
 use Illuminate\Support\Facades\File;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFile;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Migration\MigrationFileList;
@@ -30,7 +29,6 @@ public function testMysql(MigrationFileList $expectedMigrationFileList, SchemaFi
         $this->app->register(ConsoleServiceProvider::class);
 
         $actualMigrationFileList = new MigrationFileList();
-        $this->instance(DateTime::class, new DateTime());
         $this->instance(DatabaseBuilder::class, new MysqlDatabaseBuilder());
         $this->instance(SchemaListRepository::class, new InMemorySchemaListRepository($schemaFileList));
         $this->instance(MigrationListRepository::class, new InMemoryMigrationListRepository($actualMigrationFileList));
@@ -83,7 +81,6 @@ public function testPostgresql(MigrationFileList $expectedMigrationFileList, Sch
         $this->app->register(ConsoleServiceProvider::class);
 
         $actualMigrationFileList = new MigrationFileList();
-        $this->instance(DateTime::class, new DateTime());
         $this->instance(DatabaseBuilder::class, new PostgresqlDatabaseBuilder());
         $this->instance(SchemaListRepository::class, new InMemorySchemaListRepository($schemaFileList));
         $this->instance(MigrationListRepository::class, new InMemoryMigrationListRepository($actualMigrationFileList));
diff --git a/tests/Console/DacapoInitCommandTest.php b/tests/Console/DacapoInitCommandTest.php
index cc459f88..21950d6c 100644
--- a/tests/Console/DacapoInitCommandTest.php
+++ b/tests/Console/DacapoInitCommandTest.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Test\App\UseCase\Console;
 
-use DateTime;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Schema\SchemaFileList;
 use UcanLab\LaravelDacapo\Dacapo\Infra\Adapter\InMemorySchemaListRepository;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Port\SchemaListRepository;
@@ -14,7 +13,6 @@ class DacapoInitCommandTest extends TestCase
     public function testResolve(): void
     {
         $this->app->register(ConsoleServiceProvider::class);
-        $this->instance(DateTime::class, new DateTime());
         $this->instance(SchemaListRepository::class, new InMemorySchemaListRepository(new SchemaFileList()));
         $this->artisan('dacapo:init')->assertExitCode(0);
     }
diff --git a/tests/Console/DacapoUninstallCommandTest.php b/tests/Console/DacapoUninstallCommandTest.php
index 11e09f79..c5f00a4a 100644
--- a/tests/Console/DacapoUninstallCommandTest.php
+++ b/tests/Console/DacapoUninstallCommandTest.php
@@ -2,7 +2,6 @@
 
 namespace UcanLab\LaravelDacapo\Test\App\UseCase\Console;
 
-use DateTime;
 use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Schema\SchemaFileList;
 use UcanLab\LaravelDacapo\Dacapo\Infra\Adapter\InMemorySchemaListRepository;
 use UcanLab\LaravelDacapo\Dacapo\UseCase\Port\SchemaListRepository;
@@ -14,7 +13,6 @@ class DacapoUninstallCommandTest extends TestCase
     public function testResolve(): void
     {
         $this->app->register(ConsoleServiceProvider::class);
-        $this->instance(DateTime::class, new DateTime());
         $this->instance(SchemaListRepository::class, new InMemorySchemaListRepository(new SchemaFileList()));
         $this->artisan('dacapo:uninstall')->assertExitCode(0);
     }