diff --git a/addons/hr_timesheet/views/res_config_settings_views.xml b/addons/hr_timesheet/views/res_config_settings_views.xml
index 66d0f647285..6588b0b2d14 100644
--- a/addons/hr_timesheet/views/res_config_settings_views.xml
+++ b/addons/hr_timesheet/views/res_config_settings_views.xml
@@ -10,7 +10,7 @@
         <field name="inherit_id" ref="base.res_config_settings_view_form"/>
         <field name="arch" type="xml">
             <xpath expr="//div[hasclass('settings')]" position="inside">
-                <div class="app_settings_block" data-string="Timesheets" string="Timesheets" data-key="hr_timesheet" groups="hr_timesheet.group_timesheet_manager">
+                <div class="app_settings_block" data-string="Timesheets" string="Timesheets" data-key="hr_timesheet" groups="hr_timesheet.group_timesheet_manager" id="timesheets">
                     <h2>Time Encoding</h2>
                     <div class="row mt16 o_settings_container">
                         <div class="col-12 col-lg-6 o_setting_box" attrs="{'invisible':[('project_time_mode_id', '!=', False)]}">
diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index d8f697261e1..f2943b533a2 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -389,7 +389,7 @@ class Project(models.Model):
 class Task(models.Model):
     _name = "project.task"
     _description = "Task"
-    _date_name = "date_start"
+    _date_name = "date_assign"
     _inherit = ['portal.mixin', 'mail.thread', 'mail.activity.mixin', 'rating.mixin']
     _mail_post_access = 'read'
     _order = "priority desc, sequence, id desc"
@@ -445,9 +445,6 @@ class Task(models.Model):
     kanban_state_label = fields.Char(compute='_compute_kanban_state_label', string='Kanban State Label', tracking=True)
     create_date = fields.Datetime("Created On", readonly=True, index=True)
     write_date = fields.Datetime("Last Updated On", readonly=True, index=True)
-    date_start = fields.Datetime(string='Starting Date',
-    default=fields.Datetime.now,
-    index=True, copy=False)
     date_end = fields.Datetime(string='Ending Date', index=True, copy=False)
     date_assign = fields.Datetime(string='Assigning Date', index=True, copy=False, readonly=True)
     date_deadline = fields.Date(string='Deadline', index=True, copy=False, tracking=True)
@@ -586,11 +583,6 @@ class Task(models.Model):
         else:
             self.stage_id = False
 
-    @api.onchange('user_id')
-    def _onchange_user(self):
-        if self.user_id:
-            self.date_start = fields.Datetime.now()
-
     @api.constrains('parent_id', 'child_ids')
     def _check_subtask_level(self):
         for task in self:
diff --git a/addons/project/report/project_report.py b/addons/project/report/project_report.py
index 54a8d061038..c1cf00c71e7 100644
--- a/addons/project/report/project_report.py
+++ b/addons/project/report/project_report.py
@@ -12,7 +12,7 @@ class ReportProjectTaskUser(models.Model):
 
     name = fields.Char(string='Task Title', readonly=True)
     user_id = fields.Many2one('res.users', string='Assigned To', readonly=True)
-    date_start = fields.Datetime(string='Assignation Date', readonly=True)
+    date_assign = fields.Datetime(string='Assignation Date', readonly=True)
     date_end = fields.Datetime(string='Ending Date', readonly=True)
     date_deadline = fields.Date(string='Deadline', readonly=True)
     date_last_stage_update = fields.Datetime(string='Last Stage Update', readonly=True)
@@ -44,7 +44,7 @@ class ReportProjectTaskUser(models.Model):
              SELECT
                     (select 1 ) AS nbr,
                     t.id as id,
-                    t.date_start as date_start,
+                    t.date_assign as date_assign,
                     t.date_end as date_end,
                     t.date_last_stage_update as date_last_stage_update,
                     t.date_deadline as date_deadline,
@@ -68,7 +68,7 @@ class ReportProjectTaskUser(models.Model):
                     t.id,
                     create_date,
                     write_date,
-                    date_start,
+                    date_assign,
                     date_end,
                     date_deadline,
                     date_last_stage_update,
diff --git a/addons/project/report/project_report_views.xml b/addons/project/report/project_report_views.xml
index 08b2c4c4f0a..d04ce364139 100644
--- a/addons/project/report/project_report_views.xml
+++ b/addons/project/report/project_report_views.xml
@@ -54,7 +54,7 @@
             <field name="model">report.project.task.user</field>
             <field name="arch" type="xml">
                 <search string="Tasks Analysis">
-                    <field name="date_start"/>
+                    <field name="date_assign"/>
                     <field name="date_end"/>
                     <field name="date_deadline"/>
                     <field name="date_last_stage_update"/>
@@ -76,7 +76,7 @@
                         <filter string="Stage" name="Stage" context="{'group_by':'stage_id'}"/>
                         <filter string="Company" name="company" context="{'group_by':'company_id'}" groups="base.group_multi_company"/>
                         <separator/>
-                        <filter string="Assignation Date" name="assignation_month" context="{'group_by':'date_start:month'}"/>
+                        <filter string="Assignation Date" name="assignation_month" context="{'group_by':'date_assign:month'}"/>
                     </group>
                 </search>
             </field>
diff --git a/addons/project/views/res_config_settings_views.xml b/addons/project/views/res_config_settings_views.xml
index 97ceecb6b5b..c2177fbdc30 100644
--- a/addons/project/views/res_config_settings_views.xml
+++ b/addons/project/views/res_config_settings_views.xml
@@ -9,7 +9,7 @@
             <xpath expr="//div[hasclass('settings')]" position="inside">
                 <div class="app_settings_block" data-string="Project" string="Project" data-key="project" groups="project.group_project_manager">
                         <h2>Tasks Management</h2>
-                        <div class="row mt16 o_settings_container">
+                        <div class="row mt16 o_settings_container" id="tasks_management">
                             <div id="use_collaborative_pad" class="col-12 col-lg-6 o_setting_box" title="Lets the company customize which Pad installation should be used to link to new pads (for example: http://etherpad.com/).">
                                 <div class="o_setting_left_pane">
                                     <field name="module_pad"/>