diff --git a/date_range/README.rst b/date_range/README.rst
index 3eedd39..4232f2d 100644
--- a/date_range/README.rst
+++ b/date_range/README.rst
@@ -14,13 +14,13 @@ Date Range
     :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
     :alt: License: AGPL-3
 .. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fserver--ux-lightgray.png?logo=github
-    :target: https://github.com/OCA/server-ux/tree/11.0/date_range
+    :target: https://github.com/OCA/server-ux/tree/12.0/date_range
     :alt: OCA/server-ux
 .. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
     :target: https://translation.odoo-community.org/projects/server-ux-11-0/server-ux-11-0-date_range
     :alt: Translate me on Weblate
 .. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
-    :target: https://runbot.odoo-community.org/runbot/250/11.0
+    :target: https://runbot.odoo-community.org/runbot/250/12.0
     :alt: Try me on Runbot
 
 |badge1| |badge2| |badge3| |badge4| |badge5| 
@@ -97,7 +97,7 @@ Bug Tracker
 Bugs are tracked on `GitHub Issues <https://github.com/OCA/server-ux/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 <https://github.com/OCA/server-ux/issues/new?body=module:%20date_range%0Aversion:%2011.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+`feedback <https://github.com/OCA/server-ux/issues/new?body=module:%20date_range%0Aversion:%2012.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
 
 Do not contact contributors directly about support or help with technical issues.
 
@@ -133,10 +133,10 @@ promote its widespread use.
     :target: https://github.com/lmignon
     :alt: lmignon
 
-Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`_:
 
 |maintainer-lmignon| 
 
-This module is part of the `OCA/server-ux <https://github.com/OCA/server-ux/tree/11.0/date_range>`_ project on GitHub.
+This module is part of the `OCA/server-ux <https://github.com/OCA/server-ux/tree/12.0/date_range>`_ project on GitHub.
 
 You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.
diff --git a/date_range/__init__.py b/date_range/__init__.py
index faa4535..4d7a49b 100644
--- a/date_range/__init__.py
+++ b/date_range/__init__.py
@@ -1,4 +1,3 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import models
diff --git a/date_range/__manifest__.py b/date_range/__manifest__.py
index fd65913..68390a2 100644
--- a/date_range/__manifest__.py
+++ b/date_range/__manifest__.py
@@ -1,14 +1,13 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 {
     "name": "Date Range",
     "summary": "Manage all kind of date range",
-    "version": "11.0.2.0.0",
+    "version": "12.0.1.0.0",
     "category": "Uncategorized",
     "website": "https://github.com/oca/server-ux",
     "author": "ACSONE SA/NV, Odoo Community Association (OCA)",
     "license": "AGPL-3",
-    "application": False,
     "installable": True,
     "depends": [
         "web",
@@ -23,6 +22,6 @@
     "qweb": [
         "static/src/xml/date_range.xml",
     ],
-    'development_status': 'Mature',
-    'maintainers': ['lmignon'],
+    "development_status": "Mature",
+    "maintainers": ["lmignon"],
 }
diff --git a/date_range/migrations/11.0.2.0.0/noupdate_changes.xml b/date_range/migrations/11.0.2.0.0/noupdate_changes.xml
deleted file mode 100644
index db1aff7..0000000
--- a/date_range/migrations/11.0.2.0.0/noupdate_changes.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version='1.0' encoding='utf-8'?>
-<odoo>
-  <record id="date_range_type_comp_rule" model="ir.rule">
-    <field name="domain_force"> ['|',('company_id','child_of',[user.company_id.id]),('company_id','=',False)]</field>
-  </record>
-  <record id="date_range_comp_rule" model="ir.rule">
-    <field name="domain_force"> ['|',('company_id','child_of',[user.company_id.id]),('company_id','=',False)]</field>
-  </record>
-</odoo>
diff --git a/date_range/migrations/11.0.2.0.0/openupgrade_analysis.txt b/date_range/migrations/11.0.2.0.0/openupgrade_analysis.txt
deleted file mode 100644
index f5a9ace..0000000
--- a/date_range/migrations/11.0.2.0.0/openupgrade_analysis.txt
+++ /dev/null
@@ -1,3 +0,0 @@
----Fields in module 'date_range'---
----XML records in module 'date_range'---
-NEW ir.rule: date_range.date_range_generator_comp_rule (noupdate)
diff --git a/date_range/migrations/11.0.2.0.0/openupgrade_analysis_work.txt b/date_range/migrations/11.0.2.0.0/openupgrade_analysis_work.txt
deleted file mode 100644
index b14d703..0000000
--- a/date_range/migrations/11.0.2.0.0/openupgrade_analysis_work.txt
+++ /dev/null
@@ -1,4 +0,0 @@
----Fields in module 'date_range'---
----XML records in module 'date_range'---
-NEW ir.rule: date_range.date_range_generator_comp_rule (noupdate)
-# NOTHING TO DO
\ No newline at end of file
diff --git a/date_range/migrations/11.0.2.0.0/post-migration.py b/date_range/migrations/11.0.2.0.0/post-migration.py
deleted file mode 100644
index 1145d80..0000000
--- a/date_range/migrations/11.0.2.0.0/post-migration.py
+++ /dev/null
@@ -1,11 +0,0 @@
-# Copyright 2017 Eficent <http://www.eficent.com>
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-
-from openupgradelib import openupgrade
-
-
-@openupgrade.migrate()
-def migrate(env, version):
-    openupgrade.load_data(
-        env.cr, 'date_range', 'migrations/11.0.2.0.0/noupdate_changes.xml',
-    )
diff --git a/date_range/models/__init__.py b/date_range/models/__init__.py
index 2464998..4c36edf 100644
--- a/date_range/models/__init__.py
+++ b/date_range/models/__init__.py
@@ -1,4 +1,3 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import date_range_type
diff --git a/date_range/models/date_range.py b/date_range/models/date_range.py
index 10e7881..704f602 100644
--- a/date_range/models/date_range.py
+++ b/date_range/models/date_range.py
@@ -1,13 +1,13 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import api, fields, models
-from odoo.tools.translate import _
+from odoo import _, api, fields, models
 from odoo.exceptions import ValidationError
 
 
 class DateRange(models.Model):
     _name = "date.range"
+    _description = "Date Range"
     _order = "type_name,date_start"
 
     @api.model
@@ -22,7 +22,7 @@ class DateRange(models.Model):
         ondelete='restrict', domain="['|', ('company_id', '=', company_id), "
                                     "('company_id', '=', False)]")
     type_name = fields.Char(
-        string='Type', related='type_id.name', readonly=True, store=True)
+        related='type_id.name', readonly=True, store=True, string="Type Name")
     company_id = fields.Many2one(
         comodel_name='res.company', string='Company', index=1,
         default=_default_company)
@@ -34,7 +34,7 @@ class DateRange(models.Model):
         ('date_range_uniq', 'unique (name,type_id, company_id)',
          'A date range must be unique per company !')]
 
-    @api.onchange('company_id')
+    @api.onchange('company_id', 'type_id')
     def _onchange_company_id(self):
         if self.company_id and self.type_id.company_id and \
                 self.type_id.company_id != self.company_id:
@@ -54,9 +54,7 @@ class DateRange(models.Model):
     @api.constrains('type_id', 'date_start', 'date_end', 'company_id')
     def _validate_range(self):
         for this in self:
-            start = fields.Date.from_string(this.date_start)
-            end = fields.Date.from_string(this.date_end)
-            if start > end:
+            if this.date_start > this.date_end:
                 raise ValidationError(
                     _("%s is not a valid range (%s > %s)") % (
                         this.name, this.date_start, this.date_end))
diff --git a/date_range/models/date_range_type.py b/date_range/models/date_range_type.py
index 9ddae3e..a5f5406 100644
--- a/date_range/models/date_range_type.py
+++ b/date_range/models/date_range_type.py
@@ -1,13 +1,13 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import api, fields, models
-from odoo.tools.translate import _
+from odoo import _, api, fields, models
 from odoo.exceptions import ValidationError
 
 
 class DateRangeType(models.Model):
     _name = "date.range.type"
+    _description = "Date Range Type"
 
     @api.model
     def _default_company(self):
@@ -18,8 +18,8 @@ class DateRangeType(models.Model):
         help="If sets date range of same type must not overlap.",
         default=False)
     active = fields.Boolean(
-        help="The active field allows you to hide the date range without "
-        "removing it.", default=True)
+        help="The active field allows you to hide the date range type "
+        "without removing it.", default=True)
     company_id = fields.Many2one(
         comodel_name='res.company', string='Company', index=1,
         default=_default_company)
@@ -35,10 +35,10 @@ class DateRangeType(models.Model):
             for rec in self.sudo():
                 if not rec.company_id:
                     continue
-                if bool(self.date_range_ids.filtered(
+                if bool(rec.date_range_ids.filtered(
                         lambda r: r.company_id and
                         r.company_id != rec.company_id)):
                     raise ValidationError(
                         _('You cannot change the company, as this '
                           'Date Range Type is  assigned to Date Range '
-                          '(%s).') % (self.date_range_ids.name_get()[0][1]))
+                          '(%s).') % (rec.date_range_ids.name_get()[0][1]))
diff --git a/date_range/readme/CONTRIBUTORS.rst b/date_range/readme/CONTRIBUTORS.rst
index 4d37025..38b10b3 100644
--- a/date_range/readme/CONTRIBUTORS.rst
+++ b/date_range/readme/CONTRIBUTORS.rst
@@ -1,3 +1,4 @@
 * Laurent Mignon <laurent.mignon@acsone.eu>
 * Alexis de Lattre <alexis.delattre@akretion.com>
 * Miquel Raïch <miquel.raich@eficent.com>
+* Andrea Stirpe <a.stirpe@onestein.nl>
diff --git a/date_range/readme/INSTALL.rst b/date_range/readme/INSTALL.rst
index 695d21f..f4bf76d 100644
--- a/date_range/readme/INSTALL.rst
+++ b/date_range/readme/INSTALL.rst
@@ -1,3 +1 @@
 The addon use the daterange method from postgres. This method is supported as of postgresql 9.2
-
-
diff --git a/date_range/static/src/js/date_range.js b/date_range/static/src/js/date_range.js
index 7775f55..9b8200e 100644
--- a/date_range/static/src/js/date_range.js
+++ b/date_range/static/src/js/date_range.js
@@ -1,125 +1,125 @@
-/* © 2016 ACSONE SA/NV (<http://acsone.eu>)
+/* Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
  * License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). */
 odoo.define('date_range.search_filters', function (require) {
-"use strict";
-
-var core = require('web.core');
-var data = require('web.data');
-var filters = require('web.search_filters');
-var rpc = require('web.rpc');
-var framework = require('web.framework');
-
-var _t = core._t;
-filters.ExtendedSearchProposition.include({
-    select_field: function(field) {
-        this._super.apply(this, arguments);
-        this.is_date_range_selected = false;
-        this.is_date = field.type === 'date' || field.type === 'datetime';
-        this.$value = this.$el.find('.searchview_extended_prop_value, .o_searchview_extended_prop_value');
-        if (this.is_date){
-            var ds = new data.DataSetSearch(this, 'date.range.type', this.context, [[1, '=', 1]]);
-            ds.read_slice(['name'], {}).done(this.proxy('add_date_range_types_operator'));
-        }
-    },
-
-    add_date_range_types_operator: function(date_range_types){
-        var self = this;
-        _.each(date_range_types, function(drt) {
-            $('<option>', {value: 'drt_' + drt.id})
-                .text(_('in ') + drt.name)
-                .appendTo(self.$el.find('.searchview_extended_prop_op, .o_searchview_extended_prop_op'));
-        });
-    },
-
-    operator_changed: function (e) {
-        var val = $(e.target).val();
-        this.is_date_range_selected = val.startsWith('drt_');
-        if (this.is_date_range_selected){
-            var type_id = val.replace('drt_', '');
-            this.date_range_type_operator_selected(type_id);
-            return;
-        }
-        this._super.apply(this, arguments);
-    },
-
-    date_range_type_operator_selected: function(type_id){
-        this.$value.empty().show();
-        var ds = new data.DataSetSearch(this, 'date.range', this.context, [['type_id', '=', parseInt(type_id)]]);
-        ds.read_slice(['name','date_start', 'date_end'], {}).done(this.proxy('on_range_type_selected'));
-
-    },
-
-    on_range_type_selected: function(date_range_values){
-        this.value = new filters.ExtendedSearchProposition.DateRange(this, this.value.field, date_range_values);
-        this.value.appendTo(this.$value);
-        if (!this.$el.hasClass('o_filter_condition')){
-            this.$value.find('.date-range-select').addClass('form-control');
-        }
-        this.value.on_range_selected();
-    },
-
-    get_filter: function () {
-        var res = this._super.apply(this, arguments);
-        if (this.is_date_range_selected){
-            // in case of date.range, the domain is provided by the server and we don't
-            // want to put nest the returned value into an array.
-            res.attrs.domain = this.value.domain;
+    "use strict";
+
+    var core = require('web.core');
+    var data = require('web.data');
+    var filters = require('web.search_filters');
+    var rpc = require('web.rpc');
+    var framework = require('web.framework');
+
+    var _t = core._t;
+    filters.ExtendedSearchProposition.include({
+        select_field: function (field) {
+            this._super.apply(this, arguments);
+            this.is_date_range_selected = false;
+            this.is_date = field.type === 'date' || field.type === 'datetime';
+            this.$value = this.$el.find('.searchview_extended_prop_value, .o_searchview_extended_prop_value');
+            if (this.is_date) {
+                var ds = new data.DataSetSearch(this, 'date.range.type', this.context, [[1, '=', 1]]);
+                ds.read_slice(['name'], {}).done(this.proxy('add_date_range_types_operator'));
+            }
+        },
+
+        add_date_range_types_operator: function (date_range_types) {
+            var self = this;
+            _.each(date_range_types, function (drt) {
+                $('<option>', {value: 'drt_' + drt.id})
+                    .text(_('in ') + drt.name)
+                    .appendTo(self.$el.find('.searchview_extended_prop_op, .o_searchview_extended_prop_op'));
+            });
+        },
+
+        operator_changed: function (e) {
+            var val = $(e.target).val();
+            this.is_date_range_selected = val.startsWith('drt_');
+            if (this.is_date_range_selected) {
+                var type_id = val.replace('drt_', '');
+                this.date_range_type_operator_selected(type_id);
+                return;
+            }
+            this._super.apply(this, arguments);
+        },
+
+        date_range_type_operator_selected: function (type_id) {
+            this.$value.empty().show();
+            var ds = new data.DataSetSearch(this, 'date.range', this.context, [['type_id', '=', parseInt(type_id, 10)]]);
+            ds.read_slice(['name','date_start', 'date_end'], {}).done(this.proxy('on_range_type_selected'));
+
+        },
+
+        on_range_type_selected: function (date_range_values) {
+            this.value = new filters.ExtendedSearchProposition.DateRange(this, this.value.field, date_range_values);
+            this.value.appendTo(this.$value);
+            if (!this.$el.hasClass('o_filter_condition')) {
+                this.$value.find('.date-range-select').addClass('form-control');
+            }
+            this.value.on_range_selected();
+        },
+
+        get_filter: function () {
+            var res = this._super.apply(this, arguments);
+            if (this.is_date_range_selected) {
+            // In case of date.range, the domain is provided by the server and we don't
+            // Want to put nest the returned value into an array.
+                res.attrs.domain = this.value.domain;
+            }
+            return res;
         }
-        return res;
-    },
 
-});
+    });
 
-/**
+    /**
 Since Odoo 11, The Field class used as base class for all specialized filter
 widgets is no more exposed by 'web.search_filters'. To create our own class we
 extend the more simple class available into the search_filters_registry as base
 class
 */
 
-filters.ExtendedSearchProposition.DateRange = core.search_filters_registry.get('id').extend({
-    template: 'SearchView.extended_search.dateRange.selection',
-    events: {
-        'change': 'on_range_selected',
-    },
-
-    init: function (parent, field, date_range_values) {
-        this._super(parent, field);
-        this.date_range_values = date_range_values;
-    },
-
-    toString: function () {
-        var select = this.$el[0];
-        var option = select.options[select.selectedIndex];
-        return option.label || option.text;
-    },
-
-    get_value: function() {
-        return parseInt(this.$el.val());
-    },
-
-    on_range_selected: function(e){
-        var self = this;
-        self.domain = '';
-        framework.blockUI();
-        return rpc.query({
+    filters.ExtendedSearchProposition.DateRange = core.search_filters_registry.get('id').extend({
+        template: 'SearchView.extended_search.dateRange.selection',
+        events: {
+            'change': 'on_range_selected'
+        },
+
+        init: function (parent, field, date_range_values) {
+            this._super(parent, field);
+            this.date_range_values = date_range_values;
+        },
+
+        toString: function () {
+            var select = this.$el[0];
+            var option = select.options[select.selectedIndex];
+            return option.label || option.text;
+        },
+
+        get_value: function () {
+            return parseInt(this.$el.val(), 10);
+        },
+
+        on_range_selected: function (e) {
+            var self = this;
+            self.domain = '';
+            framework.blockUI();
+            return rpc.query({
                 args: [this.get_value()],
                 kwargs: {
                     field_name: this.field.name
                 },
                 model: 'date.range',
-                method: 'get_domain',
+                method: 'get_domain'
             })
-            .then(function (domain) {
-                framework.unblockUI();
-                self.domain = domain;
-            });
-    },
-
-    get_domain: function (field, operator) {
-        return this.domain;
-    },
+                .then(function (domain) {
+                    framework.unblockUI();
+                    self.domain = domain;
+                });
+        },
+
+        get_domain: function (field, operator) {
+            return this.domain;
+        }
 
-});
+    });
 
 });
diff --git a/date_range/tests/__init__.py b/date_range/tests/__init__.py
index 974619e..089c6d7 100644
--- a/date_range/tests/__init__.py
+++ b/date_range/tests/__init__.py
@@ -1,4 +1,3 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import test_date_range_type
diff --git a/date_range/tests/test_date_range.py b/date_range/tests/test_date_range.py
index 28d6d5c..398d663 100644
--- a/date_range/tests/test_date_range.py
+++ b/date_range/tests/test_date_range.py
@@ -1,8 +1,10 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
 
-from odoo.tests.common import TransactionCase
+import datetime
+
 from odoo.exceptions import ValidationError
+from odoo.tests.common import TransactionCase
 
 
 class DateRangeTest(TransactionCase):
@@ -105,8 +107,8 @@ class DateRangeTest(TransactionCase):
         # By default the domain include limits
         self.assertEqual(
             domain,
-            [('my_field', '>=', '2015-01-01'),
-             ('my_field', '<=', '2015-12-31')])
+            [('my_field', '>=', datetime.date(2015, 1, 1)),
+             ('my_field', '<=', datetime.date(2015, 12, 31))])
 
     def test_date_range_multicompany_1(self):
         dr = self.date_range.new({
diff --git a/date_range/tests/test_date_range_generator.py b/date_range/tests/test_date_range_generator.py
index 4ff05de..9bbe929 100644
--- a/date_range/tests/test_date_range_generator.py
+++ b/date_range/tests/test_date_range_generator.py
@@ -1,10 +1,13 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)nses/agpl).
 
-from odoo.tests.common import TransactionCase
-from odoo.exceptions import ValidationError
+import datetime
+
 from dateutil.rrule import MONTHLY
 
+from odoo.exceptions import ValidationError
+from odoo.tests.common import TransactionCase
+
 
 class DateRangeGeneratorTest(TransactionCase):
     post_install = True
@@ -43,8 +46,8 @@ class DateRangeGeneratorTest(TransactionCase):
             [('type_id', '=', self.type.id)])
         self.assertEqual(len(ranges), 4)
         range4 = ranges[3]
-        self.assertEqual(range4.date_start, '1943-10-01')
-        self.assertEqual(range4.date_end, '1943-12-31')
+        self.assertEqual(range4.date_start, datetime.date(1943, 10, 1))
+        self.assertEqual(range4.date_end, datetime.date(1943, 12, 31))
         self.assertEqual(range4.type_id, self.type)
 
     def test_generator_multicompany_1(self):
diff --git a/date_range/tests/test_date_range_type.py b/date_range/tests/test_date_range_type.py
index 8178c09..51519ff 100644
--- a/date_range/tests/test_date_range_type.py
+++ b/date_range/tests/test_date_range_type.py
@@ -1,10 +1,11 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
 
-from odoo.tests.common import TransactionCase
-from odoo.tools import mute_logger
 from psycopg2 import IntegrityError
+
 from odoo.exceptions import ValidationError
+from odoo.tests.common import TransactionCase
+from odoo.tools import mute_logger
 
 
 class DateRangeTypeTest(TransactionCase):
diff --git a/date_range/wizard/__init__.py b/date_range/wizard/__init__.py
index c9d4472..bb07173 100644
--- a/date_range/wizard/__init__.py
+++ b/date_range/wizard/__init__.py
@@ -1,4 +1,3 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import date_range_generator
diff --git a/date_range/wizard/date_range_generator.py b/date_range/wizard/date_range_generator.py
index 8887735..fd89907 100644
--- a/date_range/wizard/date_range_generator.py
+++ b/date_range/wizard/date_range_generator.py
@@ -1,19 +1,16 @@
-# © 2016 ACSONE SA/NV (<http://acsone.eu>)
+# Copyright 2016 ACSONE SA/NV (<http://acsone.eu>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import api, fields, models
-from odoo.tools.translate import _
-from odoo.exceptions import ValidationError
-from dateutil.rrule import (rrule,
-                            YEARLY,
-                            MONTHLY,
-                            WEEKLY,
-                            DAILY)
 from dateutil.relativedelta import relativedelta
+from dateutil.rrule import DAILY, MONTHLY, WEEKLY, YEARLY, rrule
+
+from odoo import _, api, fields, models
+from odoo.exceptions import ValidationError
 
 
 class DateRangeGenerator(models.TransientModel):
     _name = 'date.range.generator'
+    _description = 'Date Range Generator'
 
     @api.model
     def _default_company(self):
@@ -41,17 +38,16 @@ class DateRangeGenerator(models.TransientModel):
     def _compute_date_ranges(self):
         self.ensure_one()
         vals = rrule(freq=self.unit_of_time, interval=self.duration_count,
-                     dtstart=fields.Date.from_string(self.date_start),
+                     dtstart=self.date_start,
                      count=self.count+1)
         vals = list(vals)
         date_ranges = []
         count_digits = len(str(self.count))
         for idx, dt_start in enumerate(vals[:-1]):
-            date_start = fields.Date.to_string(dt_start.date())
+            date_start = dt_start.date()
             # always remove 1 day for the date_end since range limits are
             # inclusive
-            dt_end = vals[idx+1].date() - relativedelta(days=1)
-            date_end = fields.Date.to_string(dt_end)
+            date_end = vals[idx+1].date() - relativedelta(days=1)
             date_ranges.append({
                 'name': '%s%0*d' % (
                     self.name_prefix, count_digits, idx + 1),