diff --git a/assignment/src/main/java/appointmentplanner/TimeSlotImpl.java b/assignment/src/main/java/appointmentplanner/TimeSlotImpl.java
new file mode 100644
index 0000000..15c41cd
--- /dev/null
+++ b/assignment/src/main/java/appointmentplanner/TimeSlotImpl.java
@@ -0,0 +1,27 @@
+package appointmentplanner;
+
+import java.time.Instant;
+
+import appointmentplanner.api.TimeSlot;
+
+public class TimeSlotImpl implements TimeSlot {
+
+  private Instant start;
+  private Instant end;
+
+  public TimeSlotImpl(Instant start, Instant end) {
+    this.start = start;
+    this.end = end;
+  }
+
+  @Override
+  public Instant start() {
+    return start;
+  }
+
+  @Override
+  public Instant end() {
+    return end;
+  }
+
+}