diff --git a/account_subsequence_fiscal_year/README.rst b/account_subsequence_fiscal_year/README.rst
new file mode 100644
index 000000000..e83d36db2
--- /dev/null
+++ b/account_subsequence_fiscal_year/README.rst
@@ -0,0 +1,8 @@
+========================================
+Accounting Subsequences per Fiscal Years
+========================================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
diff --git a/account_subsequence_fiscal_year/__init__.py b/account_subsequence_fiscal_year/__init__.py
new file mode 100644
index 000000000..0650744f6
--- /dev/null
+++ b/account_subsequence_fiscal_year/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/account_subsequence_fiscal_year/__manifest__.py b/account_subsequence_fiscal_year/__manifest__.py
new file mode 100644
index 000000000..b1b13ae51
--- /dev/null
+++ b/account_subsequence_fiscal_year/__manifest__.py
@@ -0,0 +1,27 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+{
+    "name": "Accounting Subsequences per Fiscal Years",
+    "summary": "Allow to create sub sequences for account moves number, based"
+    " on the fiscal years settings",
+    "version": "12.0.1.0.0",
+    "category": "Accounting",
+    "author": "GRAP,Odoo Community Association (OCA)",
+    "maintainers": ["legalsylvain"],
+    "website": "http://www.github.com/OCA/account-financial-tools",
+    "license": "AGPL-3",
+    "depends": [
+        "account",
+    ],
+    "data": [
+        "views/view_res_config_settings.xml",
+    ],
+    "demo": [
+        "demo/res_groups.xml",
+    ],
+    "images": [
+        "static/description/res_config_setting.png",
+    ],
+}
diff --git a/account_subsequence_fiscal_year/demo/res_groups.xml b/account_subsequence_fiscal_year/demo/res_groups.xml
new file mode 100644
index 000000000..12fb85d0a
--- /dev/null
+++ b/account_subsequence_fiscal_year/demo/res_groups.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+@author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+-->
+<odoo>
+
+    <record id="account.group_account_user" model="res.groups">
+        <field name="users" eval="[(4, ref('base.user_admin'))]"/>
+    </record>
+
+</odoo>
+
diff --git a/account_subsequence_fiscal_year/i18n/fr.po b/account_subsequence_fiscal_year/i18n/fr.po
new file mode 100644
index 000000000..0dcc21557
--- /dev/null
+++ b/account_subsequence_fiscal_year/i18n/fr.po
@@ -0,0 +1,79 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#   * account_subsequence_fiscal_year
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-05-30 17:11+0000\n"
+"PO-Revision-Date: 2020-05-30 17:11+0000\n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: account_subsequence_fiscal_year
+#: model_terms:ir.ui.view,arch_db:account_subsequence_fiscal_year.view_res_config_settings_form
+msgid "<span class=\"o_form_label\">Accounting Subsequences Method</span>"
+msgstr "<span class=\"o_form_label\">Méthode pour les sous-séquences comptables</span>"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model.fields,field_description:account_subsequence_fiscal_year.field_res_company__account_subsequence_method
+#: model:ir.model.fields,field_description:account_subsequence_fiscal_year.field_res_config_settings__account_subsequence_method
+msgid "Accounting Subsequences Method"
+msgstr "Méthode pour les sous-séquences comptables"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model,name:account_subsequence_fiscal_year.model_account_bank_statement
+msgid "Bank Statement"
+msgstr "Relevé bancaire"
+
+#. module: account_subsequence_fiscal_year
+#: selection:res.company,account_subsequence_method:0
+msgid "Based on Company Settings"
+msgstr "Basé sur les paramètres de la société"
+
+#. module: account_subsequence_fiscal_year
+#: selection:res.company,account_subsequence_method:0
+msgid "Based on Fiscal Years Settings"
+msgstr "Basés sur les exercices comptables"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model,name:account_subsequence_fiscal_year.model_res_company
+msgid "Companies"
+msgstr "Sociétés"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model,name:account_subsequence_fiscal_year.model_res_config_settings
+msgid "Config Settings"
+msgstr "Paramètres de config"
+
+#. module: account_subsequence_fiscal_year
+#: model_terms:ir.ui.view,arch_db:account_subsequence_fiscal_year.view_res_config_settings_form
+msgid "Define how accounting subsequences are generated"
+msgstr "Définit comment les sous-séquences comptables sont générées"
+
+#. module: account_subsequence_fiscal_year
+#: model_terms:ir.ui.view,arch_db:account_subsequence_fiscal_year.view_res_config_settings_form
+msgid "Generation Method"
+msgstr "Méthode de génération"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model,name:account_subsequence_fiscal_year.model_account_move
+msgid "Journal Entries"
+msgstr "Pièces comptables"
+
+#. module: account_subsequence_fiscal_year
+#: model:ir.model,name:account_subsequence_fiscal_year.model_ir_sequence
+msgid "Sequence"
+msgstr "Séquence"
+
+#. module: account_subsequence_fiscal_year
+#: code:addons/account_subsequence_fiscal_year/models/ir_sequence.py:45
+#, python-format
+msgid "You can not post an accounting entry for the date %s because there is no fiscal year defined at this date."
+msgstr "Vous ne pouvez pas valider une pièce comptable pour la date du %s car aucun exercice comptable n'est défini à cette date."
+
diff --git a/account_subsequence_fiscal_year/models/__init__.py b/account_subsequence_fiscal_year/models/__init__.py
new file mode 100644
index 000000000..5a544b6e6
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/__init__.py
@@ -0,0 +1,5 @@
+from . import account_bank_statement
+from . import account_move
+from . import ir_sequence
+from . import res_company
+from . import res_config_settings
diff --git a/account_subsequence_fiscal_year/models/account_bank_statement.py b/account_subsequence_fiscal_year/models/account_bank_statement.py
new file mode 100644
index 000000000..8ad2e9034
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/account_bank_statement.py
@@ -0,0 +1,14 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from odoo import api, models
+
+
+class AccountBankStatement(models.Model):
+    _inherit = "account.bank.statement"
+
+    @api.multi
+    def button_open(self):
+        return super(
+            AccountBankStatement, self.with_context(account_sequence=True)
+        ).button_open()
diff --git a/account_subsequence_fiscal_year/models/account_move.py b/account_subsequence_fiscal_year/models/account_move.py
new file mode 100644
index 000000000..2f224a7a6
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/account_move.py
@@ -0,0 +1,14 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from odoo import api, models
+
+
+class AccountMove(models.Model):
+    _inherit = "account.move"
+
+    @api.multi
+    def post(self, invoice=False):
+        return super(
+            AccountMove, self.with_context(account_sequence=True)
+        ).post(invoice=invoice)
diff --git a/account_subsequence_fiscal_year/models/ir_sequence.py b/account_subsequence_fiscal_year/models/ir_sequence.py
new file mode 100644
index 000000000..3f7c21911
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/ir_sequence.py
@@ -0,0 +1,59 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+import datetime
+from dateutil.relativedelta import relativedelta
+
+from odoo import _, fields, models
+from odoo.exceptions import ValidationError
+
+
+class IrSequence(models.Model):
+    _inherit = "ir.sequence"
+
+    def _create_date_range_seq(self, date):
+        AccountFiscalYear = self.env["account.fiscal.year"]
+        IrSequenceDateRange = self.env["ir.sequence.date_range"]
+        if self._context.get("account_sequence", False)\
+                and self.company_id\
+                and self.company_id.account_subsequence_method:
+
+            method = self.company_id.account_subsequence_method
+            object_date = fields.Date.from_string(date)
+
+            if method == "company_setting":
+                base_date = datetime.date(
+                    object_date.year,
+                    int(self.company_id.fiscalyear_last_month),
+                    int(self.company_id.fiscalyear_last_day),
+                )
+                if object_date <= base_date:
+                    date_from = base_date + relativedelta(years=-1, days=1)
+                    date_to = base_date
+                else:
+                    date_from = base_date + relativedelta(days=1)
+                    date_to = base_date + relativedelta(years=1)
+
+            elif method == "fiscal_year_setting":
+                fiscal_years = AccountFiscalYear.search(
+                    [("date_to", ">=", object_date.strftime("%Y-%m-%d"))],
+                    order="date_from desc",
+                    limit=1
+                )
+                if not fiscal_years or fiscal_years[0].date_from > object_date:
+                    raise ValidationError(_(
+                        "You can not post an accounting entry for the"
+                        " date %s because there is no fiscal year defined at"
+                        " this date.") % (date))
+                date_from = fiscal_years[0].date_from
+                date_to = fiscal_years[0].date_to
+
+            # Create and return new sequence
+            return IrSequenceDateRange.sudo().create({
+                'sequence_id': self.id,
+                'date_from': date_from,
+                'date_to': date_to,
+            })
+
+        return super()._create_date_range_seq(date)
diff --git a/account_subsequence_fiscal_year/models/res_company.py b/account_subsequence_fiscal_year/models/res_company.py
new file mode 100644
index 000000000..9d45c1b4a
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/res_company.py
@@ -0,0 +1,16 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import fields, models
+
+
+class ResCompany(models.Model):
+    _inherit = "res.company"
+
+    account_subsequence_method = fields.Selection(
+        string="Accounting Subsequences Method",
+        selection=[
+            ("company_setting", "Based on Company Settings"),
+            ("fiscal_year_setting", "Based on Fiscal Years Settings"),
+        ])
diff --git a/account_subsequence_fiscal_year/models/res_config_settings.py b/account_subsequence_fiscal_year/models/res_config_settings.py
new file mode 100644
index 000000000..1ff9e9ba4
--- /dev/null
+++ b/account_subsequence_fiscal_year/models/res_config_settings.py
@@ -0,0 +1,13 @@
+# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from odoo import fields, models
+
+
+class ResConfigSettings(models.TransientModel):
+    _inherit = "res.config.settings"
+
+    account_subsequence_method = fields.Selection(
+        related="company_id.account_subsequence_method",
+        readonly=False,
+    )
diff --git a/account_subsequence_fiscal_year/readme/CONFIGURE.rst b/account_subsequence_fiscal_year/readme/CONFIGURE.rst
new file mode 100644
index 000000000..990acc24a
--- /dev/null
+++ b/account_subsequence_fiscal_year/readme/CONFIGURE.rst
@@ -0,0 +1,27 @@
+To configure this module, you need to:
+
+* Add your users to the group 'Technical Settings / Show Full Accounting Features'
+
+* Go to Invoicing > Configuration / Settings
+
+* configure your accounting settings
+
+.. figure:: ../static/description/res_config_setting.png
+
+Depending on what you want, 3 options are available.
+
+Given the following example:
+
+- an account move with a date set to 2030-06-01
+- a company set with ``fiscalyear_last_day = 1`` and ``fiscalyear_last_month = 10``
+
+* 'empty' (default value):
+  the subsequence will be created "normaly", with ``date_from = 2030-01-01`` and ``date_to = 2030-12-31``
+
+* 'Based on Company Settings':
+  the subsequence will be created depending on the values of ``fiscalyear_last_day``
+  and ``fiscalyear_last_month``, so ``date_from = 2029-10-01`` and ``date_to = 2030-09-30``
+
+* 'Based on Fiscal Years Settings':
+  the subsequence will be created with the values defined in the according fiscal year.
+  Note that if no fiscal year is found, the generation will fail.
diff --git a/account_subsequence_fiscal_year/readme/CONTRIBUTORS.rst b/account_subsequence_fiscal_year/readme/CONTRIBUTORS.rst
new file mode 100644
index 000000000..9f76a75bc
--- /dev/null
+++ b/account_subsequence_fiscal_year/readme/CONTRIBUTORS.rst
@@ -0,0 +1 @@
+* Sylvain LE GAL <https://twitter.com/legalsylvain>
diff --git a/account_subsequence_fiscal_year/readme/DESCRIPTION.rst b/account_subsequence_fiscal_year/readme/DESCRIPTION.rst
new file mode 100644
index 000000000..73340d02d
--- /dev/null
+++ b/account_subsequence_fiscal_year/readme/DESCRIPTION.rst
@@ -0,0 +1,9 @@
+This module extends the functionality of Accounting Odoo module, to
+generate custom sub sequences for accounting entries, if fiscal years are not "classic".
+(ie: last day = 31 / last month = 12)
+
+without this module, in such cases (for example, for fiscal year from 01 April 2020 to 31 May 2021)
+accounting moves of the same fiscal year will not have the same numbering: Some entries will
+have ``BILL/2020/`` prefix and other will have ``BILL/2021/``, that is not allowed in many countries.
+
+That modules fixes this problem.
diff --git a/account_subsequence_fiscal_year/static/description/res_config_setting.png b/account_subsequence_fiscal_year/static/description/res_config_setting.png
new file mode 100644
index 000000000..23ac1df7c
Binary files /dev/null and b/account_subsequence_fiscal_year/static/description/res_config_setting.png differ
diff --git a/account_subsequence_fiscal_year/tests/__init__.py b/account_subsequence_fiscal_year/tests/__init__.py
new file mode 100644
index 000000000..d9b96c4fa
--- /dev/null
+++ b/account_subsequence_fiscal_year/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_module
diff --git a/account_subsequence_fiscal_year/tests/test_module.py b/account_subsequence_fiscal_year/tests/test_module.py
new file mode 100644
index 000000000..125366c76
--- /dev/null
+++ b/account_subsequence_fiscal_year/tests/test_module.py
@@ -0,0 +1,142 @@
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo.tests.common import TransactionCase
+from odoo.exceptions import ValidationError
+
+from datetime import date
+
+
+class TestModule(TransactionCase):
+
+    def setUp(self):
+        super().setUp()
+        self.AccountFiscalYear = self.env["account.fiscal.year"]
+        self.company = self.env.ref("base.main_company")
+        self.account_type_receivable = self.env["account.account.type"].create(
+            {"name": "Test Receivable", "type": "receivable"}
+        )
+        self.account_receivable = self.env["account.account"].create(
+            {
+                "name": "Test Receivable",
+                "code": "TEST_AR",
+                "user_type_id": self.account_type_receivable.id,
+                "reconcile": True,
+            }
+        )
+        self.sale_journal = self.env["account.journal"].search(
+            [("type", "=", "sale"), ("company_id", "=", self.company.id)]
+        )[0]
+        self.sequence = self.sale_journal.sequence_id
+        self.sequence.use_date_range = True
+
+        self.account_move = self.env["account.move"].create({
+            "journal_id": self.sale_journal.id,
+            "company_id": self.company.id,
+            "line_ids": [(0, 0, {
+                "account_id": self.account_receivable.id,
+                "debit": 100,
+            }), (0, 0, {
+                "account_id": self.account_receivable.id,
+                "credit": 100,
+            })]
+        })
+
+        self.existing_subsequence_ids =\
+            self.env["ir.sequence.date_range"].search([
+                ("sequence_id", "=", self.sequence.id)]).ids
+
+    def _get_new_subsequence(self):
+        return self.env["ir.sequence.date_range"].search([
+            ("sequence_id", "=", self.sequence.id),
+            ("id", "not in", self.existing_subsequence_ids),
+        ])
+
+    def test_method_normal(self):
+        """Non Regression Test"""
+        self.company.account_subsequence_method = False
+        self.account_move.date = "2100-06-01"
+        self.account_move.post()
+        new_subsequences = self._get_new_subsequence()
+        self.assertEqual(len(new_subsequences), 1)
+        self.assertEqual(
+            new_subsequences[0].date_from,
+            date(2100, 1, 1)
+        )
+        self.assertEqual(
+            new_subsequences[0].date_to,
+            date(2100, 12, 31)
+        )
+
+    def test_method_company_setting_before(self):
+        self.company.account_subsequence_method = 'company_setting'
+        self.company.fiscalyear_last_day = 31
+        self.company.fiscalyear_last_month = 3
+        self.account_move.date = "2100-03-15"
+        self.account_move.post()
+
+        new_subsequences = self._get_new_subsequence()
+        self.assertEqual(len(new_subsequences), 1)
+        self.assertEqual(
+            new_subsequences[0].date_from,
+            date(2099, 4, 1)
+        )
+        self.assertEqual(
+            new_subsequences[0].date_to,
+            date(2100, 3, 31)
+        )
+
+    def test_method_company_setting_after(self):
+        self.company.account_subsequence_method = 'company_setting'
+        self.company.fiscalyear_last_day = 31
+        self.company.fiscalyear_last_month = 3
+        self.account_move.date = "2100-05-15"
+        self.account_move.post()
+
+        new_subsequences = self._get_new_subsequence()
+        self.assertEqual(len(new_subsequences), 1)
+        self.assertEqual(
+            new_subsequences[0].date_from,
+            date(2100, 4, 1)
+        )
+        self.assertEqual(
+            new_subsequences[0].date_to,
+            date(2101, 3, 31)
+        )
+
+    def test_method_fiscal_year_setting(self):
+        self.company.account_subsequence_method = 'fiscal_year_setting'
+        with self.assertRaises(ValidationError):
+            self.account_move.date = "2100-06-01"
+            self.account_move.post()
+
+        # create a Fiscal Year
+        self.AccountFiscalYear.create({
+            "name": "2100 FY April to March",
+            "company_id": self.company.id,
+            "date_from": "2100-04-01",
+            "date_to": "2101-03-31",
+        })
+
+        # Try to post out the date range
+        with self.assertRaises(ValidationError):
+            self.account_move.date = "2100-03-31"
+            self.account_move.post()
+
+        with self.assertRaises(ValidationError):
+            self.account_move.date = "2101-04-01"
+            self.account_move.post()
+
+        # Post in the range should succeed
+        self.account_move.date = "2100-06-01"
+        self.account_move.post()
+        new_subsequences = self._get_new_subsequence()
+        self.assertEqual(len(new_subsequences), 1)
+        self.assertEqual(
+            new_subsequences[0].date_from,
+            date(2100, 4, 1)
+        )
+        self.assertEqual(
+            new_subsequences[0].date_to,
+            date(2101, 3, 31)
+        )
diff --git a/account_subsequence_fiscal_year/views/view_res_config_settings.xml b/account_subsequence_fiscal_year/views/view_res_config_settings.xml
new file mode 100644
index 000000000..b0ab90a5c
--- /dev/null
+++ b/account_subsequence_fiscal_year/views/view_res_config_settings.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
+@author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+-->
+<odoo>
+
+    <record id="view_res_config_settings_form" model="ir.ui.view">
+        <field name="model">res.config.settings</field>
+        <field name="inherit_id" ref="account.res_config_settings_view_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//div[@id='accounting_reports']" position="inside">
+                <div class="col-12 col-lg-6 o_setting_box">
+                    <div class="o_setting_left_pane"/>
+                    <div class="o_setting_right_pane">
+                        <span class="o_form_label">Accounting Subsequences Method</span>
+                        <div class="text-muted">
+                            Define how accounting subsequences are generated
+                        </div>
+                        <div class="content-group">
+                            <div class="row mt16">
+                                <label string="Generation Method" for="account_subsequence_method" class="col-lg-3 o_light_label"/>
+                                <field name="account_subsequence_method"/>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </xpath>
+        </field>
+    </record>
+
+</odoo>