diff --git a/terka/adapters/orm.py b/terka/adapters/orm.py
index 70927c1..5f35996 100644
--- a/terka/adapters/orm.py
+++ b/terka/adapters/orm.py
@@ -222,7 +222,9 @@
                 Column("end_date", Date, nullable=False),
                 Column("status", Enum(sprint.SprintStatus)),
                 Column("capacity", Integer, nullable=False),
-                Column("goal", String(225), nullable=True))
+                Column("goal", String(225), nullable=True),
+                Column("started_at", DateTime, nullable=True),
+                Column("completed_at", DateTime, nullable=True))
 
 sprint_tasks = Table(
     "sprint_tasks",
@@ -232,6 +234,7 @@
     Column("sprint", ForeignKey("sprints.id"), nullable=False),
     Column("story_points", Integer, nullable=False),
     Column("is_active_link", Boolean, nullable=False),
+    Column("unplanned", Boolean, nullable=False),
 )
 
 time_tracker_entries = Table(
diff --git a/terka/domain/entities/sprint.py b/terka/domain/entities/sprint.py
index e9dba40..53e3e33 100644
--- a/terka/domain/entities/sprint.py
+++ b/terka/domain/entities/sprint.py
@@ -27,6 +27,8 @@ def __init__(self,
                  status: str = "PLANNED",
                  capacity: int = 40,
                  goal: str | None = None,
+                 started_at: datetime | None = None,
+                 completed_at: datetime | None = None,
                  **kwargs) -> None:
         if not start_date and not end_date:
             raise ValueError("Please add start and end date of the sprint")
@@ -48,7 +50,8 @@ def __init__(self,
         self.status = self._validate_status(status)
         self.goal = goal
         self.capacity = capacity
-        self.is_completed = False
+        self.started_at = started_at
+        self.completed_at = completed_at
 
     def _validate_status(self, status):
         if status and status not in [s.name for s in SprintStatus]:
@@ -64,17 +67,21 @@ def complete(self, tasks) -> None:
         if incompleted_tasks:
             logging.warning("[Sprint %d]: %d tasks haven't been completed",
                             self.id, len(incompleted_tasks))
-        self.is_completed = True
+
+    @property
+    def is_completed(self) -> bool:
+        return self.status == SprintStatus.COMPLETED
 
     @property
     def overplanned(self) -> bool:
         return self.velocity > self.capacity
 
     @property
-    def remaining_capatity(self) -> float:
+    def remaining_capacity(self) -> float:
         if not self.overplanned:
             return self.capacity - self.velocity
         return 0
+
     @property
     def velocity(self) -> float:
         return round(sum([t.story_points for t in self.tasks]), 1)
@@ -100,6 +107,14 @@ def total_time_spent(self):
             total_time_spent_sprint += sprint_task.tasks.total_time_spent
         return total_time_spent_sprint
 
+    @property
+    def unplanned_tasks(self) -> list[Task]:
+        tasks = []
+        for entity_task in self.tasks:
+            if entity_task.unplanned:
+                tasks.append(entity_task.tasks)
+        return tasks
+
     @property
     def open_tasks(self) -> list[Task]:
         tasks = []
@@ -120,7 +135,6 @@ def completed_tasks(self) -> list[Task]:
                 tasks.append(task)
         return tasks
 
-
     @property
     def pct_completed(self) -> float:
         if (total_tasks := len(self.tasks)) > 0:
@@ -165,3 +179,4 @@ class SprintTask:
     story_points: int = 0
     #TODO: add actual_time_spent: int = 0
     is_active_link: bool = True
+    unplanned: bool = False
diff --git a/terka/presentations/text_ui/ui.py b/terka/presentations/text_ui/ui.py
index a179bc2..994f2b5 100644
--- a/terka/presentations/text_ui/ui.py
+++ b/terka/presentations/text_ui/ui.py
@@ -853,10 +853,21 @@ def compose(self) -> ComposeResult:
                                           key=lambda x: x[1],
                                           reverse=True):
                     sorted_projects += f"  * {name}: {Formatter.format_time_spent(value)} \n"
+                if started_at := self.entity.started_at:
+                    started_at_string = started_at.strftime("%Y-%m-%d %H:%M")
+                else:
+                    if self.entity.status.name != "PLANNED":
+                        started_at_string = self.entity.start_date.strftime(
+                            "%Y-%m-%d %H:%M")
+                    else:
+                        started_at_string = "Not started"
+
                 yield MarkdownViewer(f"""
 # Sprint details:
 * Period: {self.entity.start_date} - {self.entity.end_date}
+* Started: {started_at_string}
 * Open tasks: {len(self.entity.open_tasks)} ({len(self.entity.tasks)})
+* Share of unplanned tasks: {round(len(self.entity.unplanned_tasks) / len(self.entity.tasks), 2) :.0%}
 * Pct Completed: {round(self.entity.pct_completed, 2) :.0%}
 * Velocity: {self.entity.velocity} ({self.entity.capacity})
 * Time spend: {Formatter.format_time_spent(self.entity.total_time_spent)}
diff --git a/terka/service_layer/handlers.py b/terka/service_layer/handlers.py
index 8e3073b..f082351 100644
--- a/terka/service_layer/handlers.py
+++ b/terka/service_layer/handlers.py
@@ -91,7 +91,7 @@ def start(cmd: commands.StartSprint,
                 raise exceptions.TerkaSprintCompleted(
                     "Cannot start completed sprint")
             uow.tasks.update(entities.sprint.Sprint, cmd.id,
-                             {"status": "ACTIVE"})
+                             {"status": "ACTIVE", "started": datetime.now()})
             uow.commit()
             for sprint_task in existing_sprint.tasks:
                 task = sprint_task.tasks
@@ -378,8 +378,11 @@ def _add(cmd: commands.AddTask, bus: "messagebus.MessageBus",
                                      {"story_points": float(story_points)})
                     uow.commit()
             else:
-                if entity_name == "sprint" and story_points:
-                    entity_dict["story_points"] = story_points
+                if entity_name == "sprint":
+                    if story_points:
+                        entity_dict["story_points"] = story_points
+                    entity_dict["unplanned"] = (existing_entity.started_at <
+                                                datetime.now())
                 entity_task = entity_task_type(**entity_dict)
                 uow.tasks.add(entity_task)
                 uow.commit()