diff --git a/src/fr/devinsy/util/DateHelper.java b/src/fr/devinsy/util/DateHelper.java
index 1aa7513..2f09b92 100755
--- a/src/fr/devinsy/util/DateHelper.java
+++ b/src/fr/devinsy/util/DateHelper.java
@@ -20,10 +20,10 @@ public class DateHelper
 {
 	//static private org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger (DateHelper.class);
 
-	static final String EUROPEAN_DATE_FORMAT = "%02/%02/%04";
-	static final String RAW_DATE_FORMAT = "%04%02%02";
-	static final String ISO_DATE_FORMAT = "%04-%02-%02";
-	static final String AMERICAN_DATE_FORMAT = "%02/%02/%04";
+	static final String EUROPEAN_DATE_FORMAT = "%02d/%02d/%04d";
+	static final String RAW_DATE_FORMAT = "%04d%02d%02d";
+	static final String ISO_DATE_FORMAT = "%04d-%02d-%02d";
+	static final String AMERICAN_DATE_FORMAT = "%02d/%02d/%04d";
 
 	static final String EUROPEAN_DATE_PATTERN = "^([0123]{0,1}\\d)/([01]{0,1}\\d)/(\\d\\d\\d\\d)$";
 	static final String RAW_DATE_PATTERN = "^(\\d\\d\\d\\d)([01]\\d)([0123]\\d)$";
diff --git a/src/fr/devinsy/util/DateTimeHelper.java b/src/fr/devinsy/util/DateTimeHelper.java
index 81af9e9..0fc807f 100755
--- a/src/fr/devinsy/util/DateTimeHelper.java
+++ b/src/fr/devinsy/util/DateTimeHelper.java
@@ -15,10 +15,10 @@ public class DateTimeHelper
 {
 	//static private org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger (DateTimeHelper.class);
 
-	static final String EUROPEAN_DATE_FORMAT = "%02/%02/%04 %02:%02:%02";
-	static final String RAW_DATE_FORMAT = "%04%02%02 %02:%02:%02";
-	static final String ISO_DATE_FORMAT = "%04-%02-%02 %02:%02:%02";
-	static final String AMERICAN_DATE_FORMAT = "%02/%02/%04 %02:%02:%02";
+	static final String EUROPEAN_DATE_FORMAT = "%02d/%02d/%04d %02d:%02d:%02d";
+	static final String RAW_DATE_FORMAT = "%04d%02d%02d %02d:%02d:%02d";
+	static final String ISO_DATE_FORMAT = "%04d-%02d-%02d %02d:%02d:%02d";
+	static final String AMERICAN_DATE_FORMAT = "%02d/%02d/%04d %02d:%02d:%02d";
 
 	static final String EUROPEAN_DATE_PATTERN = "^([0123]{0,1}\\d)/([01]{0,1}\\d)/(\\d\\d\\d\\d)$";
 	static final String RAW_DATE_PATTERN = "^(\\d\\d\\d\\d)([01]\\d)([0123]\\d)$";