diff --git a/addons/calendar/static/src/views/attendee_calendar/common/attendee_calendar_common_renderer.xml b/addons/calendar/static/src/views/attendee_calendar/common/attendee_calendar_common_renderer.xml
index efc01d141c4..1314126479e 100644
--- a/addons/calendar/static/src/views/attendee_calendar/common/attendee_calendar_common_renderer.xml
+++ b/addons/calendar/static/src/views/attendee_calendar/common/attendee_calendar_common_renderer.xml
@@ -7,7 +7,8 @@
                 <t t-esc="title"/>
                 <t t-if="!isAllDay">
                     <t t-if="24 > duration and duration > 0.5">
-                        <br/><t t-esc="startTime"/> - <t t-esc="endTime"/>
+                        <br/>
+                        <span class="fw-normal"><t t-esc="startTime" /> - <t t-esc="endTime" /></span>
                     </t>
                     <t t-else="">, <t t-esc="startTime"/></t>
                 </t>
diff --git a/addons/calendar/static/src/views/calendar_form/calendar_quick_create.xml b/addons/calendar/static/src/views/calendar_form/calendar_quick_create.xml
index 1eb0d79bc35..71bdadf8567 100644
--- a/addons/calendar/static/src/views/calendar_form/calendar_quick_create.xml
+++ b/addons/calendar/static/src/views/calendar_form/calendar_quick_create.xml
@@ -2,7 +2,7 @@
 <templates xml:space="preserve">
     <t t-name="calendar.CalendarQuickCreateButtons" t-inherit="web.FormViewDialog.ToOne.buttons">
         <xpath expr="//button[contains(@class, 'o_form_button_cancel')]" position="after">
-            <button class="btn btn-secondary" t-on-click="goToFullEvent">More Options</button>
+            <button class="btn btn-secondary ms-auto" t-on-click="goToFullEvent">More Options</button>
         </xpath>
     </t>
 </templates>
diff --git a/addons/calendar/static/src/views/widgets/calendar_week_days.xml b/addons/calendar/static/src/views/widgets/calendar_week_days.xml
index 0f1788337da..debb1413999 100644
--- a/addons/calendar/static/src/views/widgets/calendar_week_days.xml
+++ b/addons/calendar/static/src/views/widgets/calendar_week_days.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates>
     <t t-name="calendar.WeekDays">
-        <div class="o_recurrent_weekdays mt-2 mb-2 d-flex">
+        <div class="o_recurrent_weekdays mb-2 d-flex">
         <t t-foreach="weekdays" t-as="day" t-key="day">
                 <div t-attf-class="o_calendar_week_days_rounded {{data[day] ? 'btn-primary' : 'btn-secondary'}}" t-on-click="() => this.onChange(day)">
                     <t t-esc="props.record.fields[day].string[0]"/>
diff --git a/addons/calendar/views/calendar_views.xml b/addons/calendar/views/calendar_views.xml
index 8b027fcf237..7c566a0982a 100644
--- a/addons/calendar/views/calendar_views.xml
+++ b/addons/calendar/views/calendar_views.xml
@@ -126,111 +126,42 @@
                     </div>
                     <group>
                         <group>
-                            <field name="start_date" string="from" invisible="not allday" readonly="not user_can_edit" required="allday" force_save="1"/>
-                            <field name="stop_date" string="to" invisible="not allday" readonly="not user_can_edit" required="allday" force_save="1"/>
-
-                            <field name="start" string="from" invisible="allday" readonly="not user_can_edit" required="not allday"/>
-                            <field name="stop" string="to" invisible="allday" readonly="not user_can_edit" required="not allday"/>
-                            <label for="duration" invisible="allday"/>
-                            <div invisible="allday">
-                                <field name="duration" widget="float_time" string="Duration" class="oe_inline" readonly="(id and recurrency) or not user_can_edit"/>
-                                <span> hours</span>
+                            <field name="start_date" widget="daterange" options="{'end_date_field': 'stop_date'}" invisible="not allday" required="allday"/>
+                            <field name="start" widget="daterange" options="{'end_date_field': 'stop'}" invisible="allday" required="not allday"/>
+                            <field name="stop_date" invisible="1" />
+                            <field name="stop" invisible="1" />
+                            <div class="d-flex gap-2" colspan="2">
+                                <div invisible="allday">
+                                    <label for="duration" class="pe-2 fw-bold text-900" invisible="allday"/>
+                                    <field name="duration" widget="float_time" string="Duration" class="oe_inline" readonly="(id and recurrency) or not user_can_edit"/>
+                                    <span> hours</span>
+                                </div>
+                                <div>
+                                    <label for="allday" class="pe-2 fw-bold text-900"/>
+                                    <field name="allday" class="oe_inline" force_save="1" readonly="not user_can_edit" colspan="1"/>
+                                </div>
                             </div>
                             <field name="event_tz" invisible="not recurrency" readonly="not user_can_edit"/>
-                            <field name="allday" force_save="1" readonly="not user_can_edit"/>
-                        </group>
-                        <group>
-                            <field name="alarm_ids" widget="many2many_tags" options="{'no_quick_create': True}"/>
-                            <field name="categ_ids" widget="many2many_tags" options="{'color_field': 'color', 'no_create_edit': True}"/>
-                        </group>
-                    </group>
-                    <notebook>
-                        <page name="page_details" string="Information">
-                            <group>
-                                <group>
-                                    <field name="location" />
-                                    <label for="videocall_location" class="opacity-100"/>
-                                    <div col="2">
-                                        <field name="videocall_location" string="Videocall URL" widget="CopyClipboardChar" force_save="1" readonly="videocall_source == 'discuss'"/>
-                                        <button name="clear_videocall_location" type="object" class="btn btn-link"
-                                            invisible="not videocall_location" context="{'recurrence_update': recurrence_update}">
-                                            <span class="fa fa-times"></span><span> Clear meeting</span>
-                                        </button>
-                                        <button name="set_discuss_videocall_location" type="object" class="btn btn-link"
-                                            invisible="videocall_location" context="{'recurrence_update': recurrence_update}">
-                                            <span class="fa fa-plus"></span><span> Add Odoo meeting</span>
-                                        </button>
-                                        <button name="action_join_video_call" class="btn btn-link" help="Join Video Call" type="object" invisible="not videocall_location">
-                                            <span class="oi oi-arrow-right"></span><span> Join video call</span>
-                                        </button>
-                                    </div>
-                                    <field name="videocall_source" invisible="1"/>
-                                    <field name="access_token" invisible="1" force_save="1"/>
-                                    <label for="privacy"/>
-                                    <div class="o_row">
-                                        <field name="show_as" readonly="not user_can_edit" nolabel="1"/>
-                                        <field name="privacy" readonly="not user_can_edit" nolabel="1"/>
-                                    </div>
-                                    <field name="user_id" widget="many2one_avatar_user" readonly="not user_can_edit"/>
-                                    <field name="description" options="{'height': 100}"/>
-                                </group>
-                                <group>
-                                    <div class="o_row" colspan="2">
-                                        <div colspan="1">
-                                            <field name="attendees_count" class="w-auto oe_inline" nolabel="1"/><span> Attendees</span>
-                                        </div>
-                                        <div name="send_buttons" class="sm-2" colspan="1">
-                                            <button name="action_open_composer" help="Send Email to attendees" type="object" string=" EMAIL" icon="fa-envelope"/>
-                                        </div>
-                                    </div>
-                                    <div colspan="2">
-                                        <field name="accepted_count" class="w-auto oe_inline" nolabel="1"/> yes,
-                                        <field name="tentative_count" class="w-auto oe_inline" nolabel="1"/> maybe,
-                                        <field name="declined_count" class="w-auto oe_inline" nolabel="1"/> no,
-                                        <field name="awaiting_count" class="w-auto oe_inline" nolabel="1"/> awaiting
-                                    </div>
-                                    <div class="d-flex align-items-baseline">
-                                        <field name="partner_ids" widget="many2manyattendee"
-                                            placeholder="Select attendees..."
-                                            context="{'force_email':True}"
-                                            domain="[('type','!=','private')]"
-                                            class="oe_inline"
-                                            readonly="not user_can_edit"
-                                        />
-                                    </div>
-                                    <div class="alert alert-warning o_form_header mt-2" invisible="not invalid_email_partner_ids" role="status">
-                                        <p><strong>The following attendees have invalid email addresses and won't receive any email notifications:</strong></p>
-                                        <field name="invalid_email_partner_ids" widget="many2manyattendee" class="oe_inline"/>
-                                    </div>
-                                </group>
-                            </group>
-                        </page>
 
-                        <page name="page_options" string="Options">
-                            <group>
-                                <field name="recurrence_id" invisible="1" />
-                                <field name="rrule_type" invisible="1" />
-                                <group class="mb-0">
-                                    <field name="recurrency" />
-                                    <field name="rrule_type_ui" class="w-auto" invisible="not recurrency" required="recurrency"/>
-                                </group>
-                                <newline />
-                                <group invisible="not recurrency">
-                                    <group class="o_row" invisible="rrule_type_ui != 'custom'">
-                                        <field name="interval" string="Repeat every" class="oe_inline w-auto" />
-                                        <field name="rrule_type" nolabel="1" class="oe_inline" required="rrule_type_ui == 'custom'"/>
-                                    </group>
-                                </group>
-                                <newline />
-                                <group class="gap-0" invisible="rrule_type_ui not in ['weekly', 'custom'] or (rrule_type_ui == 'custom' and rrule_type != 'weekly')">
-                                    <span class="fw-bold pe-3">Repeat on</span>
-                                    <widget name="calendar_week_days" />
-                                </group>
-                                <group>
-                                    <field name="recurrence_id" invisible="1" />
-                                </group>
-                            </group>
-                            <div class="d-flex gap-2" invisible="rrule_type_ui not in ['monthly', 'custom'] or (rrule_type_ui == 'custom' and rrule_type != 'monthly')">
+
+                            <field name="recurrence_id" invisible="1" />
+                            <field name="rrule_type" invisible="1" />
+                            <field name="recurrency" />
+                            <field name="rrule_type_ui" class="w-auto" invisible="not recurrency" required="recurrency"/>
+                            <div invisible="not recurrency" colspan="2">
+                                <div class="o_row" invisible="rrule_type_ui != 'custom'">
+                                    <label for="interval" class="fw-bold text-900"/>
+                                    <field name="interval" string="Repeat every" class="oe_inline w-auto" />
+                                    <field name="rrule_type" nolabel="1" class="oe_inline" required="rrule_type_ui == 'custom'"/>
+                                </div>
+                            </div>
+                            <div class="d-flex gap-0" colspan="2" invisible="rrule_type_ui not in ['weekly', 'custom'] or (rrule_type_ui == 'custom' and rrule_type != 'weekly')">
+                                <span class="fw-bold pe-3">Repeat on</span>
+                                <widget name="calendar_week_days" />
+                            </div>
+                            <field name="recurrence_id" invisible="1" />
+
+                            <div class="d-flex gap-2" colspan="2" invisible="rrule_type_ui not in ['monthly', 'custom'] or (rrule_type_ui == 'custom' and rrule_type != 'monthly')">
                                 <label string="Day of Month" for="month_by" />
                                 <field name="month_by" nolabel="1" required="rrule_type_ui == 'monthly' or rrule_type == 'monthly'"/>
                                 <field name="day" nolabel="1"
@@ -246,16 +177,76 @@
                                     invisible="month_by != 'day'"
                                 />
                             </div>
-                            <div class="d-flex gap-2" invisible="not recurrency">
-                                <label string="Until" for="end_type" />
+                            <div class="d-flex gap-2" colspan="2" invisible="not recurrency">
+                                <label string="Until" for="end_type" class="fw-bold text-900"/>
                                 <field name="end_type" class="oe_inline w-auto" nolabel="1" required="recurrency"/>
                                 <field name="count" class="oe_inline w-auto" nolabel="1" invisible="end_type != 'count'" required="recurrency"/>
                                 <field name="until" class="oe_inline w-auto" nolabel="1" invisible="end_type != 'end_date'"
                                     required="recurrency and end_type == 'end_date'"
                                 />
                             </div>
-                        </page>
 
+                            <field name="location" placeholder="Online Meeting"/>
+                            <label for="videocall_location" class="opacity-100"/>
+                            <div col="2">
+                                <field name="videocall_location" string="Videocall URL" widget="CopyClipboardChar" force_save="1" readonly="videocall_source == 'discuss'"/>
+                                <button name="clear_videocall_location" type="object" class="btn btn-link"
+                                    invisible="not videocall_location" context="{'recurrence_update': recurrence_update}">
+                                    <span class="fa fa-times"></span><span> Clear meeting</span>
+                                </button>
+                                <button name="set_discuss_videocall_location" type="object" class="btn btn-link ps-0"
+                                    invisible="videocall_location" context="{'recurrence_update': recurrence_update}">
+                                    <span class="fa fa-plus"></span><span> Odoo meeting</span>
+                                </button>
+                                <button name="action_join_video_call" class="btn btn-link" help="Join Video Call" type="object" invisible="not videocall_location">
+                                    <span class="oi oi-arrow-right"></span><span> Join video call</span>
+                                </button>
+                            </div>
+                            <field name="videocall_source" invisible="1"/>
+                            <field name="access_token" invisible="1" force_save="1"/>
+                            <field name="categ_ids" widget="many2many_tags" options="{'color_field': 'color', 'no_create_edit': True}"/>
+                            <label for="privacy"/>
+                                    <div class="o_row">
+                                        <field name="show_as" readonly="not user_can_edit" nolabel="1"/>
+                                        <field name="privacy" readonly="not user_can_edit" nolabel="1"/>
+                                    </div>
+                                    <field name="user_id" widget="many2one_avatar_user" readonly="not user_can_edit"/>
+                                    <field name="description" options="{'height': 100}"/>
+
+
+                        </group>
+                        <group>
+                            <field name="alarm_ids" widget="many2many_tags" options="{'no_quick_create': True}"/>
+                            <div class="o_row" colspan="2">
+                                <div colspan="1">
+                                    <field name="attendees_count" class="w-auto oe_inline" nolabel="1"/><span> Attendees</span>
+                                </div>
+                                <div name="send_buttons" class="d-flex gap-2 justify-content-end" colspan="1">
+                                    <button name="action_open_composer" help="Send Email to attendees" type="object" string=" EMAIL" icon="fa-envelope"/>
+                                </div>
+                            </div>
+                            <div colspan="2">
+                                <field name="accepted_count" class="w-auto oe_inline" nolabel="1"/> yes,
+                                <field name="tentative_count" class="w-auto oe_inline" nolabel="1"/> maybe,
+                                <field name="declined_count" class="w-auto oe_inline" nolabel="1"/> no,
+                                <field name="awaiting_count" class="w-auto oe_inline" nolabel="1"/> awaiting
+                            </div>
+                            <div class="d-flex align-items-baseline" colspan="2">
+                                <field name="partner_ids" widget="many2manyattendee"
+                                    placeholder="Select attendees..."
+                                    context="{'force_email':True}"
+                                    domain="[('type','!=','private')]"
+                                    class="oe_inline"
+                                    readonly="not user_can_edit"
+                                />
+                            </div>
+                            <div class="alert alert-warning o_form_header mt-2" invisible="not invalid_email_partner_ids" role="status">
+                                <p><strong>The following attendees have invalid email addresses and won't receive any email notifications:</strong></p>
+                                <field name="invalid_email_partner_ids" widget="many2manyattendee" class="oe_inline"/>
+                            </div>
+                        </group>
+                    </group>
+                    <notebook>
                         <page name="page_invitations" string="Invitations" groups="base.group_no_one" invisible="not user_can_edit">
                             <button name="action_sendmail" type="object" string="Send Invitations" icon="fa-envelope" class="oe_link"/>
                             <field name="attendee_ids" widget="one2many" mode="tree,kanban" readonly="1">
@@ -315,15 +306,11 @@
                         <h1 class="w-100"><field name="name" nolabel="1" placeholder="Add title" colspan="2"/></h1>
                     </div>
                     <group>
-                        <field name="start_date" string="From" invisible="not allday" required="allday"/>
-                        <field name="stop_date" string="To" invisible="not allday" required="allday"/>
-                        <field name="start" string="From" invisible="allday" required="not allday" options="{'block': True, 'icon': 'fa fa-users'}"/>
-                        <field name="stop" string="To" invisible="allday"/>
-                    </group>
-                    <group>
+                        <field name="start_date" widget="daterange" options="{'end_date_field': 'stop_date'}" invisible="not allday" required="allday"/>
+                        <field name="start" widget="daterange" options="{'end_date_field': 'stop'}" invisible="allday" required="not allday"/>
+                        <field name="stop_date" invisible="1" />
+                        <field name="stop" invisible="1" />
                         <field name="allday"/>
-                    </group>
-                    <group>
                         <field name="partner_ids" widget="many2manyattendee"
                             placeholder="Add attendees..."
                             context="{'force_email':True}"
@@ -332,19 +319,19 @@
                         <label for="videocall_location" class="opacity-100"/>
                         <div col="2">
                             <field name="videocall_location" string="Videocall URL" widget="CopyClipboardChar" force_save="1" readonly="videocall_source == 'discuss'"/>
-                            <button name="clear_videocall_location" type="object" class="btn btn-link"
+                            <button name="clear_videocall_location" type="object" class="btn btn-link p-0"
                                 invisible="not videocall_location" context="{'recurrence_update': recurrence_update}">
                                 <span class="fa fa-times"></span><span> Clear meeting</span>
                             </button>
-                            <button name="set_discuss_videocall_location" type="object" class="btn btn-link"
+                            <button name="set_discuss_videocall_location" type="object" class="btn btn-link p-0"
                                 invisible="videocall_location" context="{'recurrence_update': recurrence_update}">
-                                <span class="fa fa-plus"></span><span> Add Odoo meeting</span>
+                                <span class="fa fa-plus"></span> <span>Odoo meeting</span>
                             </button>
                             <button name="action_join_video_call" class="btn btn-link" help="Join Video Call" type="object" invisible="not videocall_location">
                                 <span class="oi oi-arrow-right"></span><span> Join video call</span>
                             </button>
                         </div>
-                        <field name="description"/>
+                        <field name="description" placeholder="Describe your meeting"/>
                     </group>
                 </sheet>
             </form>
diff --git a/addons/web/static/src/core/dialog/dialog.xml b/addons/web/static/src/core/dialog/dialog.xml
index 78a1f34836b..75c761c81d4 100644
--- a/addons/web/static/src/core/dialog/dialog.xml
+++ b/addons/web/static/src/core/dialog/dialog.xml
@@ -19,7 +19,7 @@
                         </header>
                         <!-- FIXME: WOWL there is a bug on t-portal on owl, in which t-portal don't work on multinode.
                         To avoid this we place the footer before the body -->
-                        <footer t-if="props.footer" class="modal-footer justify-content-around justify-content-sm-start flex-wrap gap-1" style="order:2">
+                        <footer t-if="props.footer" class="modal-footer justify-content-around justify-content-sm-start flex-wrap gap-1 w-100" style="order:2">
                             <t t-slot="footer" close="() => this.data.close()">
                                 <button class="btn btn-primary o-default-button" t-on-click="() => this.data.close()">
                                     <t>Ok</t>
diff --git a/addons/web/static/src/views/calendar/calendar_common/calendar_common_popover.xml b/addons/web/static/src/views/calendar/calendar_common/calendar_common_popover.xml
index a07bbb60bc4..a250aee4571 100644
--- a/addons/web/static/src/views/calendar/calendar_common/calendar_common_popover.xml
+++ b/addons/web/static/src/views/calendar/calendar_common/calendar_common_popover.xml
@@ -17,9 +17,7 @@
 
     <t t-name="web.CalendarCommonPopover.popover">
         <div class="card-header d-flex justify-content-between py-2 pe-2">
-            <h4 class="p-0 pt-1">
-                <span class="popover-header border-0" t-esc="props.record.title" />
-            </h4>
+            <span class="popover-header border-0" t-esc="props.record.title" />
             <span class="o_cw_popover_close ms-4 mt-2 me-2" t-on-click.stop="() => props.close()">
                 <i class="fa fa-close" />
             </span>
@@ -36,11 +34,11 @@
         <ul class="list-group list-group-flush">
             <li t-if="date" class="list-group-item">
                 <i class="fa fa-fw fa-calendar-o" />
-                <b class="text-capitalize" t-esc="date" /> <small t-if="dateDuration"><b t-esc="`(${dateDuration})`" /></small>
+                <b class="text-capitalize ms-2" t-esc="date" /> <small t-if="dateDuration"><b t-esc="`(${dateDuration})`" /></small>
             </li>
             <li t-if="time" class="list-group-item">
                 <i class="fa fa-fw fa-clock-o" />
-                <b t-esc="time" /> <small t-if="timeDuration"><b t-esc="`(${timeDuration})`" /></small>
+                <b class="ms-2" t-esc="time" /> <small t-if="timeDuration"><b t-esc="`(${timeDuration})`" /></small>
             </li>
         </ul>
         <ul class="list-group list-group-flush o_cw_popover_fields_secondary">
@@ -52,7 +50,7 @@
                             <strong class="me-2" t-if="!fieldInfo.options.noLabel">
                                 <t t-if="fieldInfo.options.icon">
                                     <b>
-                                        <i t-att-class="fieldInfo.options.icon" />
+                                        <i t-attf-class="fa-fw {{fieldInfo.options.icon}}" />
                                     </b>
                                 </t>
                                 <t t-else="">
diff --git a/addons/web/static/src/views/form/form_controller.xml b/addons/web/static/src/views/form/form_controller.xml
index 3dc942460f4..7f02391ff4e 100644
--- a/addons/web/static/src/views/form/form_controller.xml
+++ b/addons/web/static/src/views/form/form_controller.xml
@@ -58,7 +58,7 @@
     </t>
 
     <t t-name="web.FormView.Buttons">
-        <div class="o_cp_buttons d-flex align-items-baseline" role="toolbar" aria-label="Main actions" t-ref="cpButtons">
+        <div class="o_cp_buttons d-flex align-items-baseline w-100" role="toolbar" aria-label="Main actions" t-ref="cpButtons">
             <div t-if="model.root.isInEdition" class="o_form_buttons_edit d-flex gap-1">
                 <button type="button" class="btn btn-primary o_form_button_save" data-hotkey="s" t-on-click.stop="() => this.saveButtonClicked({closable: true})">
                     Save