diff --git a/build.gradle b/build.gradle
index 4993892..5e6e5e8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,7 +18,7 @@ apply plugin: 'maven'
 apply plugin: 'maven-publish'
 
 group 'ch.grisu118.js'
-version '0.2.1'
+version '0.3.0'
 
 repositories {
   mavenCentral()
diff --git a/src/main/kotlin/ch/grisu118/js/api/Date.kt b/src/main/kotlin/ch/grisu118/js/api/Date.kt
new file mode 100644
index 0000000..7748146
--- /dev/null
+++ b/src/main/kotlin/ch/grisu118/js/api/Date.kt
@@ -0,0 +1,6 @@
+package ch.grisu118.js.api
+
+external class Date {
+  fun toISOString(): String
+  fun toTimeString(): String
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt b/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt
index 4467ac0..2a0025e 100644
--- a/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt
+++ b/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt
@@ -1,7 +1,5 @@
 package ch.grisu118.js.logger
 
-import kotlin.reflect.KFunction1
-
 abstract class ALogger(protected val name: String, protected var level: Level) : ILogger {
   override val isTrace: Boolean
     get() = level >= Level.TRACE
@@ -15,8 +13,8 @@ abstract class ALogger(protected val name: String, protected var level: Level) :
     get() = level >= Level.ERROR
 
   protected fun log(level: Level, message: Any?) {
-    val msg = "$level [$name]: $message"
-    when(level) {
+    val msg = LoggerConfig.replace(level = level, message = message, name = name)
+    when (level) {
       Level.TRACE, Level.DEBUG -> console.log(msg)
       Level.INFO -> console.info(msg)
       Level.WARN -> console.warn(msg)
@@ -26,8 +24,8 @@ abstract class ALogger(protected val name: String, protected var level: Level) :
   }
 
   protected fun log(level: Level, message: Any?, t: Throwable) {
-    val msg = "$level [$name]: $message"
-    when(level) {
+    val msg = LoggerConfig.replace(level = level, message = message, name = name)
+    when (level) {
       Level.TRACE, Level.DEBUG -> console.log(msg, t)
       Level.INFO -> console.info(msg, t)
       Level.WARN -> console.warn(msg, t)
@@ -35,4 +33,5 @@ abstract class ALogger(protected val name: String, protected var level: Level) :
       else -> throw IllegalArgumentException("Invalid level $level")
     }
   }
+
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt b/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt
new file mode 100644
index 0000000..6ed7034
--- /dev/null
+++ b/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt
@@ -0,0 +1,29 @@
+package ch.grisu118.js.logger
+
+import ch.grisu118.js.api.Date
+
+object LoggerConfig {
+
+  /**
+   * The template for the log messages.
+   * The following Placeholders exists:
+   * + **%l** - Will be replaced with the level of this message
+   * + **%n** - Will be replaced with the name of the logger
+   * + **%m** - Will be replaced with the message
+   * + **%t** - Will be replaced with the current time
+   * + **%dt** - Will be replaced with the iso datetime string
+   * + **%%** - Will be replaced with with a single `%`
+   */
+  var messageTemplate = "%l [%n]: %m"
+
+  internal fun replace(level: Level, name: String, message: Any?): String {
+    val date = Date()
+    var msg = messageTemplate.replace("%l", level.toString())
+    msg = msg.replace("%n", name)
+    msg = msg.replace("%m", message.toString())
+    msg = msg.replace("%dt", date.toISOString())
+    msg = msg.replace("%t", date.toTimeString())
+    msg = msg.replace("%%", "%")
+    return msg
+  }
+}
\ No newline at end of file