diff --git a/helpers/trendings_helper.py b/helpers/trendings_helper.py
index b85caca..06951bb 100644
--- a/helpers/trendings_helper.py
+++ b/helpers/trendings_helper.py
@@ -158,3 +158,43 @@ class Trendings_helper:
                 tagSet.add(tag['name'])
         to_ret[self.keyTag] = list(tagSet)
         return to_ret
+
+    # In contrary of getGenericTrending, it regroups items in the format: {item, start: timestamp1, end: timestamp2}
+    # so that it can be displayed easily on the timeline.
+    def getGenericTrendingOvertime(self, dateS, dateE, trendingType=None, topNum=0):
+        trendingType = self.keyEvent
+        dico_items = {}
+        to_format = []
+        prev_days = (dateE - dateS).days
+        # get data
+        for curDate in util.getXPrevDaysSpan(dateE, prev_days):
+            keyname = "{}:{}".format(trendingType, util.getDateStrFormat(curDate))
+            data = self.serv_redis_db.zrange(keyname, 0, topNum-1, desc=True, withscores=True)
+            data = [ [record[0].decode('utf8'), record[1]] for record in data ]
+            data = data if data is not None else []
+            to_format.append([util.getTimestamp(curDate), data])
+
+        for timestamp, array in to_format:
+            for item, _ in array:
+                if item not in dico_items:
+                    dico_items[item] = []
+                dico_items[item].append(timestamp)
+
+        # sort timestamps in correct order
+        for item in dico_items.keys():
+            dico_items[item].sort()
+        # dico_items have the form: {item: [t1,t2,t4], ...}
+        to_ret = []
+        ONEDAY = 60*60*24
+        for item, timestamps in dico_items.items():
+            obj = {'name': item, 'start': timestamps[0]-ONEDAY, 'end': timestamps[0]}
+            for t in timestamps:
+                if t-obj['end'] > ONEDAY: #new entry
+                    to_ret.append(obj)
+                    obj['start'] = t-ONEDAY
+                    obj['end'] = t
+                else: # contrinue entry
+                    obj['end'] = t
+            to_ret.append(obj)
+
+        return to_ret
diff --git a/install_dependencies.sh b/install_dependencies.sh
index 420fade..7c98f8b 100755
--- a/install_dependencies.sh
+++ b/install_dependencies.sh
@@ -108,4 +108,9 @@ mv temp/jquery-punchcard/src/punchcard.js ./static/js
 mv temp/jquery-punchcard/src/punchcard.css ./static/css
 wget https://momentjs.com/downloads/moment.js -O ./static/js/moment.js
 
+# timeline
+VISJS_VERSION="4.21.0"
+https://cdnjs.cloudflare.com/ajax/libs/vis/${VISJS_VERSION}/vis.min.js
+https://cdnjs.cloudflare.com/ajax/libs/vis/${VISJS_VERSION}/vis.min.css
+
 rm -rf ./temp
diff --git a/server.py b/server.py
index ee57001..a23e40d 100755
--- a/server.py
+++ b/server.py
@@ -536,5 +536,17 @@ def getTypeaheadData():
     data = trendings_helper.getTypeaheadData(dateS, dateE)
     return jsonify(data)
 
+@app.route("/_getGenericTrendingOvertime")
+def getGenericTrendingOvertime():
+    try:
+        dateS = datetime.datetime.fromtimestamp(float(request.args.get('dateS')))
+        dateE = datetime.datetime.fromtimestamp(float(request.args.get('dateE')))
+    except:
+        dateS = datetime.datetime.now() - datetime.timedelta(days=7)
+        dateE = datetime.datetime.now()
+
+    data = trendings_helper.getGenericTrendingOvertime(dateS, dateE)
+    return jsonify(data)
+
 if __name__ == '__main__':
     app.run(host='localhost', port=8001, threaded=True)
diff --git a/static/js/trendings.js b/static/js/trendings.js
index 79741e9..7d38216 100644
--- a/static/js/trendings.js
+++ b/static/js/trendings.js
@@ -9,6 +9,7 @@ var tagPie = ["#tagPie"];
 var tagLine = ["#tagLine"];
 var sightingLineWidget;
 var discLine = ["#discussionLine"];
+var timeline;
 var allData;
 var globalColorMapping = {};
 
@@ -103,6 +104,8 @@ var typeaheadOption_tag = {
         updateLineForLabel(tagLine, tag, undefined, url_getTrendingTag);
     }
 }
+var timeline_option = {};
+
 
 /* FUNCTIONS */
 function getColor(label) {
@@ -396,6 +399,29 @@ function updateDisc() {
     });
 }
 
+function updateTimeline() {
+    $.getJSON( url_getGenericTrendingOvertime+"?dateS="+parseInt(dateStart.getTime()/1000)+"&dateE="+parseInt(dateEnd.getTime()/1000), function( data ) {
+        var items = [];
+        var i = 1;
+        for (var obj of data) {
+            if (obj.end == obj.start) { console.log(obj);}
+            items.push({
+                id: i,
+                content: obj.name,
+                start: obj.start*1000,
+                end: obj.end*1000
+            });
+            i++;
+        }
+        items = new vis.DataSet(items);
+        if (timeline === undefined) { // create timeline
+            timeline = new vis.Timeline(document.getElementById('timeline'), items, timeline_option);
+        } else { // update
+            timeline.setItems(items);
+        }
+    });
+}
+
 function dateChanged() {
     dateStart = datePickerWidgetStart.datepicker( "getDate" );
     dateEnd = datePickerWidgetEnd.datepicker( "getDate" );
@@ -404,6 +430,7 @@ function dateChanged() {
     updatePieLine(tagPie, tagLine, url_getTrendingTag);
     updateSignthingsChart();
     updateDisc();
+    updateTimeline();
 }
 
 $(document).ready(function () {
@@ -426,6 +453,7 @@ $(document).ready(function () {
     updatePieLine(tagPie, tagLine, url_getTrendingTag)
     updateSignthingsChart();
     updateDisc();
+    updateTimeline();
 
     $( "#num_selector" ).change(function() {
         var sel = parseInt($( this ).val());
@@ -437,5 +465,4 @@ $(document).ready(function () {
         position: "absolute",
         display: "none",
     }).appendTo("body");
-
 });
diff --git a/templates/trendings.html b/templates/trendings.html
index 924e316..2a71b7e 100644
--- a/templates/trendings.html
+++ b/templates/trendings.html
@@ -36,6 +36,9 @@
     <link href="{{ url_for('static', filename='css/jquery-ui.min.css') }}" rel="stylesheet" type="text/css" />
     <script src="{{ url_for('static', filename='js/jquery-ui.min.js') }}"></script>
 
+    <link href="{{ url_for('static', filename='css/vis.min.css') }}" rel="stylesheet" type="text/css" />
+    <script src="{{ url_for('static', filename='js/vis.min.js') }}"></script>
+
 </head>
 
 <style>
@@ -206,6 +209,17 @@ small {
                         </div>
                     </div><!-- /.col-lg-12 -->
 
+                    <div class="col-lg-12">
+                        <div class="panel panel-default" style="">
+                            <div class="panel-heading" style="font-weight: bold;">
+                                <b>Timeline</b>
+                            </div>
+                            <div class="panel-body" style="">
+                                <div id="timeline" style="width:100%; height: 100%;"></div>
+                            </div>
+                        </div>
+                    </div><!-- /.col-lg-12 -->
+
                 </div><!-- /.row -->
 
             </div> <!-- /.container-fluid -->
@@ -226,6 +240,7 @@ small {
         var url_getTrendingTag = "{{ url_for('getTrendingTags') }}";
         var url_getTrendingSightings = "{{ url_for('getTrendingSightings') }}";
         var url_getTrendingDisc = "{{ url_for('getTrendingDisc') }}";
+        var url_getGenericTrendingOvertime = "{{ url_for('getGenericTrendingOvertime') }}";
 
         var url_getTypeaheadData = "{{ url_for('getTypeaheadData') }}";