diff --git a/core/smn_core.cpp b/core/smn_core.cpp
index 777267d0..8548ab66 100644
--- a/core/smn_core.cpp
+++ b/core/smn_core.cpp
@@ -89,7 +89,7 @@ static cell_t FormatTime(IPluginContext *pContext, const cell_t *params)
 	pContext->LocalToString(params[1], &buffer);
 	pContext->LocalToString(params[3], &format);
 
-	time_t t = time(NULL);
+	time_t t = (params[4] == -1) ? time(NULL) : (time_t)params[4];
 	strftime(buffer, params[2], format, localtime(&t));
 
 	return 1;
diff --git a/plugins/include/sourcemod.inc b/plugins/include/sourcemod.inc
index fdd337a5..55cfecd2 100644
--- a/plugins/include/sourcemod.inc
+++ b/plugins/include/sourcemod.inc
@@ -270,9 +270,10 @@ native GetTime(bigStamp[2]={0,0});
  * @param buffer		Destination string buffer.
  * @param maxlength		Maximum length of output string buffer.
  * @param format		Formatting rules.
+ * @param stamp			Optional time stamp.
  * @noreturn
  */
-native FormatTime(String:buffer[], maxlength, const String:format[]);
+native FormatTime(String:buffer[], maxlength, const String:format[], stamp=-1);
 
 /**
  * Loads a game config file.