diff --git a/src/Entity/Field/DateImmutable.php b/src/Entity/Field/DateImmutable.php
new file mode 100644
index 0000000..5f45a40
--- /dev/null
+++ b/src/Entity/Field/DateImmutable.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Ulmus\Entity\Field;
+
+class Date extends DatetimeImmutable {
+    
+    public string $format = "Y-m-d";
+}
diff --git a/src/Entity/Field/Datetime.php b/src/Entity/Field/Datetime.php
index 37d31f4..bc04752 100644
--- a/src/Entity/Field/Datetime.php
+++ b/src/Entity/Field/Datetime.php
@@ -5,66 +5,6 @@ namespace Ulmus\Entity\Field;
 use Ulmus\Entity\EntityObjectInterface;
 
 class Datetime extends \DateTime implements EntityObjectInterface, \JsonSerializable {
-
-    public string $format = "Y-m-d H:i:s";
-
-    public function load(mixed ...$arguments)
-    {
-        $value = $arguments[0];
-
-        try {
-            # From Timestamp
-            if ( is_numeric($value) ) {
-                $obj = new static("@$value");
-            }
-            else {
-                $obj = new static($value);
-            }
-        }
-        catch(\Throwable $ex) {
-            throw new \Exception(sprintf("An error occured trying to instanciate from '%s'. %s", $value, $ex->getMessage()), $ex->getCode(), $ex);
-        }
-
-        return $obj;
-    }
-
-    public function setTime($hour, $minute, $second = 0, $microsecond = 0) : \DateTime
-    {
-        $fromParent = parent::setTime($hour, $minute, $second, $microsecond);
-
-        return new static($fromParent);
-    }
-
-    public function save()
-    {
-        return $this->__toString();
-    }
-
-    public function __toString()
-    {
-        return $this->format($this->format);
-    }
-
-    #[\Deprecated]
-    public function formatLocale(string $format) : string
-    {
-        return strftime($format, $this->getTimestamp());
-    }
-
-    public function formatLocaleIntl(int $dateFormatter = \IntlDateFormatter::LONG, int $timeFormatter = \IntlDateFormatter::NONE, ? string $pattern = null) : string
-    {
-        $formatter = new \IntlDateFormatter(\Locale::getDefault(), $dateFormatter, $timeFormatter, \date_default_timezone_get(), \IntlDateFormatter::GREGORIAN, $pattern);
-
-        return $formatter->format($this->getTimestamp());
-    }
-
-    public function ageAt(null|\DateTime $dateTime) : int
-    {
-        return (int) ( (int) ($dateTime ?: new DateTime())->format('Ymd') - (int) $this->format('Ymd') ) / 10000;
-    }
-
-    public function jsonSerialize(): mixed
-    {
-        return $this;
-    }
+    use DatetimeTrait;
 }
+
diff --git a/src/Entity/Field/DatetimeImmutable.php b/src/Entity/Field/DatetimeImmutable.php
new file mode 100644
index 0000000..ef83482
--- /dev/null
+++ b/src/Entity/Field/DatetimeImmutable.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace Ulmus\Entity\Field;
+
+use Ulmus\Entity\EntityObjectInterface;
+
+class DatetimeImmutable extends \DateTimeImmutable implements EntityObjectInterface {
+    use DatetimeTrait;
+}
diff --git a/src/Entity/Field/DatetimeTrait.php b/src/Entity/Field/DatetimeTrait.php
new file mode 100644
index 0000000..05d1355
--- /dev/null
+++ b/src/Entity/Field/DatetimeTrait.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Ulmus\Entity\Field;
+
+trait DatetimeTrait
+{
+    public string $format = "Y-m-d H:i:s";
+
+    public function load(mixed ...$arguments)
+    {
+        $value = $arguments[0];
+
+        try {
+            # From Timestamp
+            if ( is_numeric($value) ) {
+                $obj = new static("@$value");
+            }
+            else {
+                $obj = new static($value);
+            }
+        }
+        catch(\Throwable $ex) {
+            throw new \Exception(sprintf("An error occured trying to instanciate from '%s'. %s", $value, $ex->getMessage()), $ex->getCode(), $ex);
+        }
+
+        return $obj;
+    }
+
+    public function setTime($hour, $minute, $second = 0, $microsecond = 0) : \DateTimeInterface
+    {
+        $fromParent = parent::setTime($hour, $minute, $second, $microsecond);
+
+        return new static($fromParent);
+    }
+
+    public function save()
+    {
+        return $this->__toString();
+    }
+
+    public function __toString()
+    {
+        return $this->format($this->format);
+    }
+
+    #[\Deprecated]
+    public function formatLocale(string $format) : string
+    {
+        return strftime($format, $this->getTimestamp());
+    }
+
+    public function formatLocaleIntl(int $dateFormatter = \IntlDateFormatter::LONG, int $timeFormatter = \IntlDateFormatter::NONE, ? string $pattern = null) : string
+    {
+        $formatter = new \IntlDateFormatter(\Locale::getDefault(), $dateFormatter, $timeFormatter, \date_default_timezone_get(), \IntlDateFormatter::GREGORIAN, $pattern);
+
+        return $formatter->format($this->getTimestamp());
+    }
+
+    public function ageAt(null|\DateTime $dateTime) : int
+    {
+        return (int) ( (int) ($dateTime ?: new DateTime())->format('Ymd') - (int) $this->format('Ymd') ) / 10000;
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/src/Entity/Field/TimeImmutable.php b/src/Entity/Field/TimeImmutable.php
new file mode 100644
index 0000000..2389bb6
--- /dev/null
+++ b/src/Entity/Field/TimeImmutable.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Ulmus\Entity\Field;
+
+class Time extends DatetimeImmutable {
+    
+    public string $format = "H:i:s";
+}