diff --git a/.idea/misc.xml b/.idea/misc.xml
index 503aca7..33952c6 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -55,7 +55,7 @@
     <ConfirmationsSetting value="0" id="Add" />
     <ConfirmationsSetting value="0" id="Remove" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/data/Utilities.java b/app/src/main/java/org/communiquons/android/comunic/client/data/Utilities.java
index 1550901..799b791 100644
--- a/app/src/main/java/org/communiquons/android/comunic/client/data/Utilities.java
+++ b/app/src/main/java/org/communiquons/android/comunic/client/data/Utilities.java
@@ -1,12 +1,15 @@
 package org.communiquons.android.comunic.client.data;
 
 import android.content.Context;
+import android.content.res.Resources;
 import android.os.Build;
 import android.text.Html;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Patterns;
 
+import org.communiquons.android.comunic.client.R;
+
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -219,8 +222,47 @@ public class Utilities {
      * @return Generated string
      */
     public String timeToString(int time){
-        //TODO : implement seconds to string function
-        return null;
+
+        Resources res = mContext.getResources();
+
+        //Check if the time is inferior to 1 => now
+        if(time < 1)
+            return res.getString(R.string.date_now);
+
+        //Less than one minute
+        else if (time < 60){
+            return time + res.getString(R.string.date_s);
+        }
+
+        //Less than one hour
+        else if (time < 3600){
+            int secs = (int) Math.floor(time / 60);
+            return secs + res.getString(R.string.date_m);
+        }
+
+        //Less than a day
+        else if (time < 86400){
+            int hours = (int) Math.floor(time / 3600);
+            return hours + res.getString(R.string.date_h);
+        }
+
+        //Less than a month
+        else if (time < 2678400){
+            int days = (int) Math.floor(time / 86400);
+            return days + res.getString(days > 1 ? R.string.date_days : R.string.date_day);
+        }
+
+        //Less than a year
+        else if (time < 31536000){
+            int months = (int) Math.floor(time / 2678400);
+            return months + res.getString(months > 1 ? R.string.date_months : R.string.date_month);
+        }
+
+        //A several amount of years
+        else {
+            int years = (int) Math.floor(31536000);
+            return years + res.getString(years > 1 ? R.string.date_years : R.string.date_year);
+        }
     }
 
 
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListAdapter.java b/app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListAdapter.java
index 3e4b842..8d63062 100644
--- a/app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListAdapter.java
+++ b/app/src/main/java/org/communiquons/android/comunic/client/data/conversations/ConversationsListAdapter.java
@@ -12,6 +12,7 @@ import android.widget.ArrayAdapter;
 import android.widget.TextView;
 
 import org.communiquons.android.comunic.client.R;
+import org.communiquons.android.comunic.client.data.Utilities;
 
 import java.util.ArrayList;
 import java.util.zip.Inflater;
@@ -29,6 +30,8 @@ import static android.R.id.list;
 
 public class ConversationsListAdapter extends ArrayAdapter<ConversationsInfo> {
 
+    private Utilities utils;
+
     /**
      * Class constructor
      *
@@ -37,6 +40,8 @@ public class ConversationsListAdapter extends ArrayAdapter<ConversationsInfo> {
      */
     public ConversationsListAdapter(Context context, ArrayList<ConversationsInfo> list){
         super(context, 0, list);
+
+        utils = new Utilities(context);
     }
 
 
@@ -89,6 +94,13 @@ public class ConversationsListAdapter extends ArrayAdapter<ConversationsInfo> {
                 .getString(R.string.conversations_members_number), infos.countMembers());
         number_members.setText(members_text);
 
+
+
+        //Update the last activity time of the conversation
+        TextView last_activity = convertView.
+                findViewById(R.id.fragment_conversationslist_item_lastactive);
+        last_activity.setText(utils.timeToString(Utilities.time() - infos.getLast_active()));
+
         return convertView;
 
     }
diff --git a/app/src/main/res/layout/fragment_conversationslist_item.xml b/app/src/main/res/layout/fragment_conversationslist_item.xml
index 1716213..639bdd2 100644
--- a/app/src/main/res/layout/fragment_conversationslist_item.xml
+++ b/app/src/main/res/layout/fragment_conversationslist_item.xml
@@ -56,6 +56,7 @@
             android:src="@android:drawable/ic_menu_my_calendar"/>
 
         <TextView
+            android:id="@+id/fragment_conversationslist_item_lastactive"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             tools:text="1min" />
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c4fd8e6..2ca6a4a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -40,6 +40,12 @@
     <string name="date_minutes">minutes</string>
     <string name="date_min">min</string>
     <string name="date_sec">sec</string>
+    <string name="date_day">day</string>
+    <string name="date_days">days</string>
+    <string name="date_month">month</string>
+    <string name="date_months">months</string>
+    <string name="date_year">year</string>
+    <string name="date_years">years</string>
     <string name="date_h">h</string>
     <string name="date_m">m</string>
     <string name="date_s">s</string>