diff --git a/java-numbers/src/main/resources/logback.xml b/java-numbers/src/main/resources/logback.xml
index 7d900d8ea8..29cb886f7b 100644
--- a/java-numbers/src/main/resources/logback.xml
+++ b/java-numbers/src/main/resources/logback.xml
@@ -2,7 +2,7 @@
 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            <pattern>%d{yyyy/MM/dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
             </pattern>
         </encoder>
     </appender>
@@ -10,4 +10,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-</configuration>
\ No newline at end of file
+</configuration>