diff --git a/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java b/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
index 36aaa84..3aecce0 100755
--- a/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
@@ -11,11 +11,14 @@ import com.plannaplan.types.GroupType;
 import com.plannaplan.types.WeekDay;
 
 /**
- *  Entity of Groups grouping of state ssociated about course,time,room,capacity,type,day
+ * Entity of Groups grouping of state ssociated about
+ * course,time,room,capacity,type,day
  */
 
 @Entity
 public class Groups {
+    private static final int DEFAULT_CLASS_TIME = 90;
+
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Long id;
@@ -23,6 +26,7 @@ public class Groups {
     @JoinColumn(name = "course_id")
     private Course course;
     private int time;
+    private int endTime;
     private String room;
     private int capacity;
     private GroupType type;
@@ -38,24 +42,50 @@ public class Groups {
      * Groups
      * 
      * @param capacity capacity given to the groups
-     * @param room room given to the groups
-     * @param course course given to the groups
-     * @param time time given to the groups
-     * @param day day given to the groups
+     * @param room     room given to the groups
+     * @param course   course given to the groups
+     * @param time     time given to the groups
+     * @param endTime  end time of class in minutes
+     * @param day      day given to the groups
      * @param lecturer lecturer given to the groups
      */
-    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer) {
+    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer) {
         this.capacity = capacity;
         this.room = room;
         this.course = course;
         this.time = time;
+        this.endTime = endTime;
         this.day = day;
         this.lecturer = lecturer;
         this.type = capacity >= 50 ? GroupType.LECTURE : GroupType.CLASS;
     }
 
+    /**
+     * Create groups with default class duration
+     * 
+     * @param capacity capacity given to the groups
+     * @param room     room given to the groups
+     * @param course   course given to the groups
+     * @param time     time given to the groups
+     * @param day      day given to the groups
+     * @param lecturer lecturer given to the groups
+     */
+    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer) {
+        this(capacity, room, course, time, time + DEFAULT_CLASS_TIME, day, lecturer);
+    }
+
+    /**
+     * get time of class end
+     * 
+     * @return hour of class finish time in minutes
+     */
+    public int getEndTime() {
+        return endTime;
+    }
+
     /**
      * getId
+     * 
      * @return id
      */
     public Long getId() {
@@ -64,6 +94,7 @@ public class Groups {
 
     /**
      * getLecturer
+     * 
      * @return lecturer
      */
     public Lecturer getLecturer() {
@@ -72,6 +103,7 @@ public class Groups {
 
     /**
      * setLecturer
+     * 
      * @param lecturer set lecturer into groups
      */
     public void setLecturer(Lecturer lecturer) {
@@ -80,6 +112,7 @@ public class Groups {
 
     /**
      * WeekDay
+     * 
      * @return day
      */
     public WeekDay getDay() {
@@ -88,6 +121,7 @@ public class Groups {
 
     /**
      * setLecturer
+     * 
      * @param day set day into groups
      */
     public void setDay(WeekDay day) {
@@ -96,6 +130,7 @@ public class Groups {
 
     /**
      * GroupType
+     * 
      * @return type
      */
     public GroupType getType() {
@@ -104,6 +139,7 @@ public class Groups {
 
     /**
      * setType
+     * 
      * @param type set type into groups
      */
     public void setType(GroupType type) {
@@ -112,6 +148,7 @@ public class Groups {
 
     /**
      * getCapacity
+     * 
      * @return capacity
      */
     public int getCapacity() {
@@ -120,6 +157,7 @@ public class Groups {
 
     /**
      * setCapacity
+     * 
      * @param capacity set capacity into groups
      */
     public void setCapacity(int capacity) {
@@ -128,6 +166,7 @@ public class Groups {
 
     /**
      * getRoom
+     * 
      * @return room
      */
     public String getRoom() {
@@ -136,6 +175,7 @@ public class Groups {
 
     /**
      * setRoom
+     * 
      * @param room set room into groups
      */
     public void setRoom(String room) {
@@ -144,6 +184,7 @@ public class Groups {
 
     /**
      * getTime
+     * 
      * @return time
      */
     public int getTime() {
@@ -152,6 +193,7 @@ public class Groups {
 
     /**
      * setTime
+     * 
      * @param time set time into groups
      */
     public void setTime(int time) {
@@ -160,6 +202,7 @@ public class Groups {
 
     /**
      * getCourseId
+     * 
      * @return course
      */
     public Course getCourseId() {
@@ -168,6 +211,7 @@ public class Groups {
 
     /**
      * setCourseId
+     * 
      * @param courseId set courseId into groups
      */
     public void setCourseId(Course courseId) {
@@ -176,6 +220,7 @@ public class Groups {
 
     /**
      * getTimeString
+     * 
      * @return time as formated String
      */
     public String getTimeString() {
@@ -187,4 +232,19 @@ public class Groups {
         }
         return String.format("%s.%s", hoursString, minutesString);
     }
+
+    /**
+     * gets end time formated strins
+     * 
+     * @return end time as formated String
+     */
+    public String getEndTimeString() {
+        int minutes = this.getEndTime() % 60;
+        String hoursString = Integer.toString(this.getEndTime() / 60);
+        String minutesString = Integer.toString(minutes);
+        if (minutes < 10) {
+            minutesString = "0" + minutesString;
+        }
+        return String.format("%s.%s", hoursString, minutesString);
+    }
 }
diff --git a/restservice/src/main/java/com/plannaplan/responses/models/GroupDefaultResponse.java b/restservice/src/main/java/com/plannaplan/responses/models/GroupDefaultResponse.java
index c182343..2a16b91 100755
--- a/restservice/src/main/java/com/plannaplan/responses/models/GroupDefaultResponse.java
+++ b/restservice/src/main/java/com/plannaplan/responses/models/GroupDefaultResponse.java
@@ -21,6 +21,9 @@ public class GroupDefaultResponse {
     @ApiModelProperty(value = "Value shows time when the course takes.")
     private String time;
 
+    @ApiModelProperty(value = "Value shows time when the course ends.")
+    private String endTime;
+
     @ApiModelProperty(value = "Value shows degree, name and surname.")
     private String lecturer;
 
@@ -37,6 +40,7 @@ public class GroupDefaultResponse {
         this.id = group.getId() != null ? group.getId() : null;
         this.day = group.getDay() != null ? group.getDay().label : -1;
         this.time = group.getTimeString() != null ? group.getTimeString() : "";
+        this.endTime = group.getEndTimeString() != null ? group.getEndTimeString() : "";
         this.lecturer = group.getLecturer() != null ? group.getLecturer().toString() : "";
         this.room = group.getRoom() != null ? group.getRoom() : "";
         this.type = group.getType() != null ? group.getType() : null;
@@ -67,6 +71,10 @@ public class GroupDefaultResponse {
         return time;
     }
 
+    public String getEndTime() {
+        return endTime;
+    }
+
     public int getDay() {
         return day;
     }