diff --git a/dibi/dibi.php b/dibi/dibi.php
index 5db46c2e..a5301218 100644
--- a/dibi/dibi.php
+++ b/dibi/dibi.php
@@ -527,10 +527,10 @@ class dibi
 	{
 		if ($time === NULL) {
 			$time = time(); // current time
-		} elseif (is_string($time)) {
-			$time = strtotime($time); // try convert to timestamp
+		} elseif (is_numeric($time)) {
+			$time = (int) $time; // timestamp
 		} else {
-			$time = (int) $time;
+			$time = strtotime($time); // try convert to timestamp
 		}
 		return new DibiVariable($time, dibi::FIELD_DATETIME);
 	}
diff --git a/dibi/libs/DibiResult.php b/dibi/libs/DibiResult.php
index 213dc63e..ba96332a 100644
--- a/dibi/libs/DibiResult.php
+++ b/dibi/libs/DibiResult.php
@@ -503,7 +503,7 @@ class DibiResult extends DibiObject implements IDataSource
 
 		case dibi::FIELD_DATE:
 		case dibi::FIELD_DATETIME:
-			$value = strtotime($value);
+			$value = is_numeric($value) ? (int) $value : strtotime($value);
 			return $format === NULL ? $value : date($format, $value);
 
 		case dibi::FIELD_BOOL:
diff --git a/dibi/libs/DibiTranslator.php b/dibi/libs/DibiTranslator.php
index e7b4afa9..cbed9e17 100644
--- a/dibi/libs/DibiTranslator.php
+++ b/dibi/libs/DibiTranslator.php
@@ -307,7 +307,7 @@ final class DibiTranslator extends DibiObject
 
 			case 'd':  // date
 			case 't':  // datetime
-				return $this->driver->escape(is_string($value) ? strtotime($value) : $value, $modifier);
+				return $this->driver->escape(is_numeric($value) ? (int) $value : strtotime($value), $modifier);
 
 			case 'by':
 			case 'n':  // identifier name
diff --git a/examples/sample.mdb b/examples/sample.mdb
index 1185a92e..e7730c28 100644
Binary files a/examples/sample.mdb and b/examples/sample.mdb differ
diff --git a/examples/sample.sdb b/examples/sample.sdb
index 99e7a1bd..01fa5119 100644
Binary files a/examples/sample.sdb and b/examples/sample.sdb differ