diff --git a/advlabdb/models.py b/advlabdb/models.py
index c45966b..445ebba 100644
--- a/advlabdb/models.py
+++ b/advlabdb/models.py
@@ -378,7 +378,9 @@ class Admin(db.Model):
 
 class Appointment(db.Model):
     id = db.Column(db.Integer, primary_key=True)
-    date = db.Column(db.Date, nullable=False)  # To be specified with the python package "datetime"
+    date = db.Column(
+        db.Date, db.CheckConstraint(f"date BETWEEN '20{MIN_YEAR}-01-01' AND '20{MAX_YEAR}-01-01'"), nullable=False
+    )  # To be specified with the python package "datetime"
     special = db.Column(db.Boolean, default=False, nullable=False)  # In the break or not
 
     group_experiment_id = db.Column(db.Integer, db.ForeignKey("group_experiment.id"), nullable=False)
diff --git a/advlabdb/scripts/test/test_database.py b/advlabdb/scripts/test/test_database.py
index f5eb754..9eccc5f 100644
--- a/advlabdb/scripts/test/test_database.py
+++ b/advlabdb/scripts/test/test_database.py
@@ -142,8 +142,8 @@ def main():
             db.session.add(as1)
             db.session.add(as2)
 
-            ap1 = Appointment(date=date(2021, 3, 21), special=True, group_experiment=gx1, assistant=as1)
-            ap2 = Appointment(date=date(2021, 3, 22), special=True, group_experiment=gx2, assistant=as2)
+            ap1 = Appointment(date=date(2022, 3, 21), special=True, group_experiment=gx1, assistant=as1)
+            ap2 = Appointment(date=date(2022, 3, 22), special=True, group_experiment=gx2, assistant=as2)
 
             db.session.add(ap1)
             db.session.add(ap2)
diff --git a/docs/database_import/database_import.adoc b/docs/database_import/database_import.adoc
index 640594d..43f75ef 100644
--- a/docs/database_import/database_import.adoc
+++ b/docs/database_import/database_import.adoc
@@ -71,7 +71,7 @@ The type of the attributes can be seen in the drawio file link:DB.drawio[] which
 * group_id
 
 === Appointment
-* date -> 21.08.2021
+* date -> 21.08.2022
 * special -> 1 / 0
 * group_experiment_id
 * assistant_email