diff --git a/src/game/lib/util/date_util.js b/src/game/lib/util/date_util.js
index 25b9a37..8f99c9e 100644
--- a/src/game/lib/util/date_util.js
+++ b/src/game/lib/util/date_util.js
@@ -1,16 +1,41 @@
 function DateUtil() {
 }
 
+
+DateUtil.getFullYear = function(date) {
+	return date.getFullYear();
+}
+
+DateUtil.getFullMonth = function(date) {
+	return StringUtil.getNumberStartWithZero(date.getMonth() + 1, 2)
+}
+
+DateUtil.getFullDate = function(date) {
+	return StringUtil.getNumberStartWithZero(date.getDate(), 2);
+}
+
+DateUtil.getFullHours = function(date) {
+	return StringUtil.getNumberStartWithZero(date.getHours(), 2);
+}
+
+DateUtil.getFullMinutes = function(date) {
+	return StringUtil.getNumberStartWithZero(date.getMinutes(), 2);
+}
+
+DateUtil.getFullSeconds = function(date) {
+	return StringUtil.getNumberStartWithZero(date.getSeconds(), 2);
+}
+
+
 DateUtil.getYYYYMMDD = function(date) {
 	// return date.toISOString().slice(0,10);
-	var yymmdd = date.getFullYear() + "-"
-		+ ("0" + (date.getMonth() + 1)).slice(-2) + "-"
-		+ ("0" + date.getDate()).slice(-2);
-	return yymmdd;
+	return DateUtil.getFullYear(date) + "-"
+		+ DateUtil.getFullMonth(date) + "-"
+		+ DateUtil.getFullDate(date);
 }
 
 DateUtil.getHHMMSS = function(date) {
-	return StringUtil.getNumberStartWithZero(date.getHours(), 2) + ":"
-		+ StringUtil.getNumberStartWithZero(date.getMinutes(), 2) + ":"
-		+ StringUtil.getNumberStartWithZero(date.getSeconds(), 2);
+	return DateUtil.getFullHours(date) + ":"
+		+ DateUtil.getFullMinutes(date) + ":"
+		+ DateUtil.getFullSeconds(date);
 }
\ No newline at end of file
diff --git a/test/tdd.js b/test/tdd.js
index e53e3d3..6cc90bd 100644
--- a/test/tdd.js
+++ b/test/tdd.js
@@ -2,13 +2,29 @@
 // DateUtil
 
 QUnit.test( "DateUtil", function( assert ) {
-	var datetime = new Date("2019-06-04T16:15:00");
-	var date = datetime.getFullYear() + "-"
-		+ ("0" + (datetime.getMonth() + 1)).slice(-2) + "-"
-		+ ("0" + datetime.getDate()).slice(-2);
-	var time = ("0" + datetime.getHours()).slice(-2) + ":"
-		+ ("0" + datetime.getMinutes()).slice(-2) + ":"
-		+ ("0" + datetime.getSeconds()).slice(-2);
+	var datetime = new Date("2019-06-04T16:15:03");
+
+	var dateTimeText = "2019-06-04T16:00:00";
+	var datetimeHour = new Date(dateTimeText);
+	var roundedDateTimeText = DateUtil.getYYYYMMDD(datetime) + "T" + datetime.getHours() + ":00:00";
+	var roundedDateTime = new Date(roundedDateTimeText);
+	assert.equal(datetimeHour - roundedDateTime, 0, "DateUtil - roundedDateTime");
+
+
+	var date = DateUtil.getFullYear(datetime) + "-"
+		+ DateUtil.getFullMonth(datetime) + "-"
+		+ DateUtil.getFullDate(datetime);
+	var time = DateUtil.getFullHours(datetime) + ":"
+		+ DateUtil.getFullMinutes(datetime) + ":"
+		+ DateUtil.getFullSeconds(datetime);
+
+	assert.equal(DateUtil.getFullYear(datetime), "2019", "DateUtil - getFullYear");
+	assert.equal(DateUtil.getFullMonth(datetime), "06", "DateUtil - getFullMonth");
+	assert.equal(DateUtil.getFullDate(datetime), "04", "DateUtil - getFullDate");
+
+	assert.equal(DateUtil.getFullHours(datetime), "16", "DateUtil - getFullHours");
+	assert.equal(DateUtil.getFullMinutes(datetime), "15", "DateUtil - getFullMinutes");
+	assert.equal(DateUtil.getFullSeconds(datetime), "03", "DateUtil - getFullSeconds");
 
 	assert.equal(DateUtil.getYYYYMMDD(datetime), date, "DateUtil - getYYYYMMDD");
 	assert.equal(DateUtil.getHHMMSS(datetime), time, "DateUtil - getHHMMSS");