diff --git a/tests/SpecRunner.html b/tests/SpecRunner.html
index 0c1d3e4b..02d8b369 100644
--- a/tests/SpecRunner.html
+++ b/tests/SpecRunner.html
@@ -46,6 +46,9 @@
 	<script src="../extension/scripts/Selector/SelectorElementClick.js"></script>
 	<script type="text/javascript" src="../extension/scripts/Sitemap.js"></script>
 	<script type="text/javascript" src="../extension/scripts/ChromePopupBrowser.js"></script>
+	<script type="text/javascript" src="../extension/scripts/DateUtils/DateRoller.js"></script>
+	<script type="text/javascript" src="../extension/scripts/DateUtils/DatePatternSupport.js"></script>
+	<script type="text/javascript" src="../extension/scripts/DateUtils/SimpleDateFormatter.js"></script>
 	<!-- content script -->
 	<script type="text/javascript" src="../extension/assets/css-selector/lib/CssSelector.js"></script>
 	<script type="text/javascript" src="../extension/scripts/DataExtractor.js"></script>
@@ -75,6 +78,7 @@
 	<script type="text/javascript" src="spec/ContentSelectorSpec.js"></script>
 	<script type="text/javascript" src="spec/SelectorListSpec.js"></script>
 	<script type="text/javascript" src="spec/SitemapSpec.js"></script>
+	<script type="text/javascript" src="spec/DateUtilsSpec.js"></script>
 	<script type="text/javascript" src="spec/BackgroundScriptSpec.js"></script>
 	<script type="text/javascript" src="spec/ContentScriptSpec.js"></script>
 	<script type="text/javascript" src="spec/SelectorSpec.js"></script>
diff --git a/tests/spec/DateUtilsSpec.js b/tests/spec/DateUtilsSpec.js
new file mode 100644
index 00000000..2008a15d
--- /dev/null
+++ b/tests/spec/DateUtilsSpec.js
@@ -0,0 +1,117 @@
+describe("DateUtils", function () {
+
+	beforeEach(function () {
+		this.addMatchers(selectorMatchers);
+	});
+
+	it("'SimpleDateFormatter.format' pattern 'yyyy/MM/dd'", function(){
+		var pattern = "yyyy/MM/dd";
+		var date = new Date("1979-02-01T00:00:00.000Z");
+		var expected = "1979/02/01";
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.format(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.format' pattern 'dd/MM/yy'", function(){
+		var pattern = "dd/MM/yy";
+		var date = new Date("1979-02-01T00:00:00.000Z");
+		var expected = "01/02/79";
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.format(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.format' pattern 'dd MMM yy'", function(){
+		var pattern = "dd MMM yy";
+		var date = new Date("1979-02-01T00:00:00.000Z");
+		var expected = "01 Feb 79";
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.format(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.format' pattern 'dd MMM yyyy'", function(){
+		var pattern = "dd MMM yyyy";
+		var date = new Date("1979-02-01T00:00:00.000Z");
+		var expected = "01 Feb 1979";
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.format(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.parse' pattern 'dd.MMM.yy'", function(){
+		var pattern = "dd.MMM.yy";
+		var date = "15.Aug.16";
+		var expected = new Date("2016-08-15T00:00:00.000Z");
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.parse(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.parse' pattern 'MM/dd/yyyy'", function(){
+		var pattern = "MM/dd/yyyy";
+		var date = "02.29.2016";
+		var expected = new Date("2016-02-29T00:00:00.000Z");
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.parse(date)).toEqual(expected);
+	});
+	
+	it("'SimpleDateFormatter.parse' pattern 'dd.MM.yyyy'", function(){
+		var pattern = "dd.MM.yyyy";
+		var date = "16.06.2016";
+		var expected = new Date("2016-06-16T00:00:00.000Z");
+		var df = new SimpleDateFormatter(pattern);
+		expect(df.parse(date)).toEqual(expected);
+	});
+	
+	it("'DateRoller.days' should return one day", function(){
+		var from = new Date("1979-02-01T00:00:00.000Z");
+		var to = new Date("1979-02-01T00:00:00.000Z");
+		var roller = DateRoller.days(from, to);
+		var expectedDays = 1;
+		expect(roller.length).toEqual(expectedDays);
+	});
+	
+	it("'DateRoller.days' should return 366 days", function(){
+		var from = new Date("2016-12-31T00:00:00.000Z");
+		var to = new Date("2016-01-01T00:00:00.000Z");
+		var roller = DateRoller.days(from, to);
+		var expectedDays = 366;
+		expect(roller.length).toEqual(expectedDays);
+	});
+	
+	it("'DateRoller.days' should return multiple days increasing", function(){
+		var from = new Date("1979-02-01T00:00:00.000Z");
+		var to = new Date("1979-02-03T00:00:00.000Z");
+		var roller = DateRoller.days(from, to);
+		var expectedDays = [
+			new Date("1979-02-01T00:00:00.000Z"),
+			new Date("1979-02-02T00:00:00.000Z"),
+			new Date("1979-02-03T00:00:00.000Z")
+		];
+		expect(roller).toEqual(expectedDays);
+	});
+	
+	it("'DateRoller.days' should return multiple days decreasing", function(){
+		var from = new Date("2017-05-02T00:00:00.000Z");
+		var to = new Date("2017-04-30T00:00:00.000Z");
+		var roller = DateRoller.days(from, to);
+		var expectedDays = [
+			new Date("2017-05-02T00:00:00.000Z"),
+			new Date("2017-05-01T00:00:00.000Z"),
+			new Date("2017-04-30T00:00:00.000Z")
+		];
+		expect(roller).toEqual(expectedDays);
+	});
+	
+	it("'DatePatternSupport.expandUrl' should return one url", function(){
+		var url = "http://example.com/[date<dd/MM/yyyy><24/05/2017><24/05/2017>]/index.html";
+		var expandedUrls = DatePatternSupport.expandUrl(url);
+		var expectedDays = ["http://example.com/24/05/2017/index.html"];
+		expect(expandedUrls).toEqual(expectedDays);
+	});
+	
+	it("'DatePatternSupport.expandUrl' should return three urls from 'yesterday' to 'tomorrow'", function(){
+		var url = "http://example.com/[date<dd/MM/yyyy><tomorrow><yesterday>]/index.html";
+		var expandedUrls = DatePatternSupport.expandUrl(url);
+		var expectedDays = 3;
+		expect(expandedUrls.length).toEqual(expectedDays);
+	});
+
+});
\ No newline at end of file