diff --git a/easy_my_coop/i18n/fr_BE.po b/easy_my_coop/i18n/fr_BE.po
index e3f4904..22cc496 100644
--- a/easy_my_coop/i18n/fr_BE.po
+++ b/easy_my_coop/i18n/fr_BE.po
@@ -2004,6 +2004,11 @@ msgstr "Date de la demande"
 msgid "Request date"
 msgstr "Date de la demande"
 
+#. module: easy_my_coop
+#: model:ir.model.fields,field_description:easy_my_coop.field_operation_request__effective_date
+msgid "Effective date"
+msgstr "Date effective"
+
 #. module: easy_my_coop
 #: model_terms:ir.ui.view,arch_db:easy_my_coop.theme_invoice_G002_document
 msgid "Request to Release\n"
diff --git a/easy_my_coop/models/operation_request.py b/easy_my_coop/models/operation_request.py
index d608128..3b5543c 100644
--- a/easy_my_coop/models/operation_request.py
+++ b/easy_my_coop/models/operation_request.py
@@ -29,6 +29,7 @@ class OperationRequest(models.Model):
     request_date = fields.Date(
         string="Request date", default=lambda self: self.get_date_now()
     )
+    effective_date = fields.Date(string='Effective date')
     partner_id = fields.Many2one(
         "res.partner",
         string="Cooperator",
@@ -118,6 +119,15 @@ class OperationRequest(models.Model):
 
     invoice = fields.Many2one("account.invoice", string="Invoice")
 
+    @api.multi
+    @api.constrains("effective_date")
+    def _constrain_effective_date(self):
+        for obj in self:
+            if obj.effective_date and obj.effective_date > fields.Date.today():
+                raise ValidationError(
+                    _("The effective date can not be in the future.")
+                )
+
     @api.multi
     def approve_operation(self):
         for rec in self:
@@ -322,7 +332,11 @@ class OperationRequest(models.Model):
     def execute_operation(self):
         self.ensure_one()
 
-        effective_date = self.get_date_now()
+        if self.effective_date:
+            effective_date = self.effective_date
+        else:
+            effective_date = self.get_date_now()
+            self.effective_date = effective_date
         sub_request = self.env["subscription.request"]
 
         self.validate()
diff --git a/easy_my_coop/views/operation_request_view.xml b/easy_my_coop/views/operation_request_view.xml
index eb1f415..61b20f2 100644
--- a/easy_my_coop/views/operation_request_view.xml
+++ b/easy_my_coop/views/operation_request_view.xml
@@ -7,6 +7,7 @@
             <tree string="Operation requests"
                   colors="green:state in ('approved'); blue:state in ('draft');grey: state in ('done')">
                 <field name="request_date"/>
+                <field name="effective_date"/>
                 <field name="partner_id"/>
                 <field name="operation_type"/>
                 <field name="quantity"/>
@@ -44,16 +45,18 @@
                         <group>
                             <field name="request_date"
                                    attrs="{'readonly':[('state','!=','draft')]}"/>
+                            <field name="effective_date"
+                                   attrs="{'readonly':[('state','!=','draft')]}"/>
                             <field name="operation_type"
                                    attrs="{'readonly':[('state','!=','draft')]}"/>
                             <field name="receiver_not_member"
-                                   attrs="{'invisible':[('operation_type','!=','transfer')]}"/>
+                                   attrs="{'invisible':[('operation_type','!=','transfer')], 'readonly':[('state','!=','draft')]}"/>
                             <field name="partner_id"
                                    options="{'no_create':True}"
                                    attrs="{'readonly':[('state','!=','draft')]}"/>
                             <field name="partner_id_to"
                                    options="{'no_create':True}"
-                                   attrs="{'invisible':['|',('operation_type','!=','transfer'), ('receiver_not_member','=',True)]}"/>
+                                   attrs="{'invisible':['|',('operation_type','!=','transfer'), ('receiver_not_member','=',True)], 'readonly':[('state','!=','draft')]}"/>
                         </group>
                         <group>
                             <field name="user_id"/>