diff --git a/hr_holiday_multiple_approval/README.rst b/hr_holiday_multiple_approval/README.rst
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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+   :alt: License: AGPL-3
+
+============================
+HR Holiday Multiple Approval
+============================
+
+This module extends the functionality of HR Holiday
+to support a Multiple Approval process.
+
+Installation
+============
+
+To install this module, you need to:
+
+1.  Clone the branch 8.0 of the repository https://github.com/open-synergy/opnsynid-hr
+2.  Add the path to this repository in your configuration (addons-path)
+3.  Update the module list
+4.  Go to menu *Setting -> Modules -> Local Modules*
+5.  Search For *HR Holiday Multiple Approval*
+6.  Install the module
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/open-synergy/opnsynid-hr/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed
+and welcomed feedback.
+
+
+Credits
+=======
+
+Contributors
+------------
+
+* Andhitia Rama <andhitia.r@gmail.com>
+* Michael Viriyananda <viriyananda.michael@gmail.com>
+
+Maintainer
+----------
+
+.. image:: https://simetri-sinergi.id/logo.png
+   :alt: PT. Simetri Sinergi Indonesia
+   :target: https://simetri-sinergi.id.com
+
+This module is maintained by the PT. Simetri Sinergi Indonesia.
diff --git a/hr_holiday_multiple_approval/__init__.py b/hr_holiday_multiple_approval/__init__.py
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+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from . import(
+    models,
+)
+
+from .hooks import (
+    set_double_validation_false,
+)
diff --git a/hr_holiday_multiple_approval/__openerp__.py b/hr_holiday_multiple_approval/__openerp__.py
new file mode 100644
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+++ b/hr_holiday_multiple_approval/__openerp__.py
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+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+# pylint: disable=locally-disabled, manifest-required-author
+{
+    "name": "HR Holiday Multiple Approval",
+    "version": "8.0.1.0.0",
+    "website": "https://simetri-sinergi.id",
+    "author": "PT. Simetri Sinergi Indonesia, OpenSynergy Indonesia",
+    "license": "AGPL-3",
+    "installable": True,
+    "auto_install": True,
+    "depends": [
+        "hr_holidays",
+    ],
+    "data": [
+        "views/hr_holidays_view.xml",
+        "views/hr_holidays_status_view.xml",
+    ],
+    "images": [
+    ],
+    "post_init_hook": "set_double_validation_false",
+}
diff --git a/hr_holiday_multiple_approval/hooks.py b/hr_holiday_multiple_approval/hooks.py
new file mode 100644
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+++ b/hr_holiday_multiple_approval/hooks.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openerp import SUPERUSER_ID
+
+
+def set_double_validation_false(cr, registry):
+    obj_hr_holidays_status = registry["hr.holidays.status"]
+    criteria = [
+        ("double_validation", "=", True)
+    ]
+    status_ids = \
+        obj_hr_holidays_status.search(cr, SUPERUSER_ID, criteria)
+    if holidays_status_ids:
+        obj_hr_holidays_status.write(
+            cr, SUPERUSER_ID, status_ids, {"double_validation": False})
diff --git a/hr_holiday_multiple_approval/models/__init__.py b/hr_holiday_multiple_approval/models/__init__.py
new file mode 100644
index 00000000..e1b5e5b7
--- /dev/null
+++ b/hr_holiday_multiple_approval/models/__init__.py
@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from . import(
+    hr_holidays,
+    tier_definition,
+)
diff --git a/hr_holiday_multiple_approval/models/hr_holidays.py b/hr_holiday_multiple_approval/models/hr_holidays.py
new file mode 100644
index 00000000..7f99443c
--- /dev/null
+++ b/hr_holiday_multiple_approval/models/hr_holidays.py
@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openerp import api, models
+
+
+class HrHolidays(models.Model):
+    _name = "hr.holidays"
+    _inherit = [
+        "hr.holidays",
+        "tier.validation",
+    ]
+    _state_from = [
+        "draft",
+        "confirm",
+    ]
+    _state_to = [
+        "validate",
+    ]
+    _cancel_state = "refuse"
+
+    @api.multi
+    def validate_tier(self):
+        _super = super(HrHolidays, self)
+        _super.validate_tier()
+        for document in self:
+            if document.validated:
+                document.signal_workflow("validate")
+
+    @api.multi
+    def restart_validation(self):
+        _super = super(HrHolidays, self)
+        _super.restart_validation()
+        for document in self:
+            document.request_validation()
+
+    @api.multi
+    def holidays_confirm(self):
+        _super = super(HrHolidays, self)
+        _super.holidays_confirm()
+        for document in self:
+            document.request_validation()
diff --git a/hr_holiday_multiple_approval/models/tier_definition.py b/hr_holiday_multiple_approval/models/tier_definition.py
new file mode 100644
index 00000000..cdd5ee95
--- /dev/null
+++ b/hr_holiday_multiple_approval/models/tier_definition.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 OpenSynergy Indonesia
+# Copyright 2020 PT. Simetri Sinergi Indonesia
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openerp import api, models
+
+
+class TierDefinition(models.Model):
+    _inherit = "tier.definition"
+
+    @api.model
+    def _get_tier_validation_model_names(self):
+        res = super(TierDefinition, self)._get_tier_validation_model_names()
+        res.append("hr.holidays")
+        return res
diff --git a/hr_holiday_multiple_approval/static/description/icon.png b/hr_holiday_multiple_approval/static/description/icon.png
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index 00000000..4c8e1127
Binary files /dev/null and b/hr_holiday_multiple_approval/static/description/icon.png differ
diff --git a/hr_holiday_multiple_approval/views/hr_holidays_status_view.xml b/hr_holiday_multiple_approval/views/hr_holidays_status_view.xml
new file mode 100644
index 00000000..90d49fef
--- /dev/null
+++ b/hr_holiday_multiple_approval/views/hr_holidays_status_view.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<!-- Copyright 2020 OpenSynergy Indonesia
+     Copyright 2020 PT. Simetri Sinergi Indonesia
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+<openerp>
+    <data>
+        <record id="hr_holidays_status_view_form" model="ir.ui.view">
+            <field name="name">hr.holidays.status.multiple.approval.form</field>
+            <field name="model">hr.holidays.status</field>
+            <field name="inherit_id" ref="hr_holidays.edit_holiday_status_form" />
+            <field name="arch" type="xml">
+                <xpath expr="//field[@name='double_validation']" position="attributes">
+                    <attribute name="invisible">1</attribute>
+                </xpath>
+            </field>
+        </record>
+    </data>
+</openerp>
diff --git a/hr_holiday_multiple_approval/views/hr_holidays_view.xml b/hr_holiday_multiple_approval/views/hr_holidays_view.xml
new file mode 100644
index 00000000..090ed61b
--- /dev/null
+++ b/hr_holiday_multiple_approval/views/hr_holidays_view.xml
@@ -0,0 +1,89 @@
+<?xml version="1.0"?>
+<!-- Copyright 2020 OpenSynergy Indonesia
+     Copyright 2020 PT. Simetri Sinergi Indonesia
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+<openerp>
+    <data>
+        <record id="hr_holidays_view_form" model="ir.ui.view">
+            <field name="name">hr.holidays.multiple.approval.form</field>
+            <field name="model">hr.holidays</field>
+            <field name="inherit_id" ref="hr_holidays.edit_holiday_new" />
+            <field name="arch" type="xml">
+                <xpath expr="//button[@name='confirm']" position="before">
+                    <button name="request_validation"
+                        string="Request Validation"
+                        attrs="{'invisible': ['|','|',('need_validation', '!=', True),('rejected','=',True),('state','not in',['confirm'])]}"
+                        type="object"/>
+                    <button name="restart_validation"
+                        string="Restart Validation"
+                        attrs="{'invisible': ['|','|',('review_ids', '=', []),('rejected','=',False),('state','not in',['confirm'])]}"
+                        type="object"/>
+                </xpath>
+                <xpath expr="//button[@name='validate']" position="attributes">
+                    <attribute name="invisible">1</attribute>
+                </xpath>
+                <xpath expr="//button[@name='reset']" position="replace">
+                    <button string="Reset to Draft" name="reset" type="workflow"
+                            attrs="{'invisible': ['|', ('can_reset', '=', False), ('state', 'not in', ['refuse'])]}"/>
+                </xpath>
+                <xpath expr="//header" position="after">
+                    <field name="need_validation" invisible="1"/>
+                    <field name="validated" invisible="1"/>
+                    <field name="rejected" invisible="1"/>
+                    <div class="alert alert-warning"
+                         attrs="{'invisible': ['|', '|', '|',
+                         ('validated', '=', True), ('state', 'not in', ['confirm']),
+                         ('rejected', '=', True), ('review_ids', '=', [])]}"
+                         style="margin-bottom:0px;">
+                        <p><i class="fa fa-info-circle"/>This Holiday needs to be
+                            validated.
+                            <button name="validate_tier"
+                                string="Validate"
+                                attrs="{'invisible': [('review_ids', '=', [])]}"
+                                type="object"
+                                class="oe_inline oe_button btn-success"
+                                icon="terp-check"/>
+                            <button name="reject_tier"
+                                string="Reject"
+                                type="object"
+                                class="btn-icon btn-danger"
+                                icon="terp-gtk-stop"/>
+                        </p>
+                    </div>
+                    <div class="alert alert-success"
+                         attrs="{'invisible': ['|', '|', ('validated', '!=', True), ('state', 'not in', ['confirm']), ('review_ids', '=', [])]}"
+                         style="margin-bottom:0px;">
+                        <p><i class="fa fa-thumbs-up"/> Operation has been <b>validated</b>!</p>
+                    </div>
+                    <div class="alert alert-danger"
+                         attrs="{'invisible': ['|', '|', ('rejected', '!=', True), ('state', 'not in', ['confirm']), ('review_ids', '=', [])]}"
+                         style="margin-bottom:0px;">
+                        <p><i class="fa fa-thumbs-down"/> Operation has been <b>rejected</b>.</p>
+                    </div>
+                </xpath>
+                <xpath expr="//field[@name='notes']" position="after">
+                    <separator string="Reviews"/>
+                    <group>
+                        <field name="definition_id"/>
+                        <field name="reviewer_partner_ids" widget="many2many_tags"/>
+                        <field name="review_ids" readonly="1"/>
+                    </group>
+                </xpath>
+            </field>
+        </record>
+
+        <record id="hr_holidays_view_search" model="ir.ui.view">
+            <field name="name">hr.holidays.multiple.approval.search</field>
+            <field name="model">hr.holidays</field>
+            <field name="inherit_id" ref="hr_holidays.view_hr_holidays_filter"/>
+            <field name="arch" type="xml">
+                <xpath expr="//filter[@name='my_department_leaves']" position="before">
+                    <filter name="needs_review" string="Needs my Review"
+                            domain="[('reviewer_ids','in',uid), ('state', 'not in', ['validate', 'refuse'])]"
+                            help="My Holidays to review"/>
+                </xpath>
+            </field>
+        </record>
+
+    </data>
+</openerp>