GOLEM/golem_event/views/event_views.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2020 Youssef EL OUAHBY <youssef@yaltik.com>
Copyright 2020 Fabien Bourgeois <fabien@yaltik.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->

<odoo>
    <data>

        <!-- Search -->
        <record id="golem_event_inherit_view_event_search" model="ir.ui.view">
            <field name="name">Event Search Adaptations</field>
            <field name="inherit_id" ref="event.view_event_search"/>
            <field name="model">event.event</field>
            <field name="arch" type="xml">
                <filter name="upcoming" position="replace">
                    <filter string="Current and Upcoming" name="upcoming"
                        domain="['&amp;', ('state', '!=', 'cancel'), '|',
                        ('date_begin','&gt;=', datetime.datetime.combine(context_today(), datetime.time(0,0,0))),
                        ('date_end','&gt;=', datetime.datetime.combine(context_today(), datetime.time(0,0,0)))]"
                        help="Current and upcoming events from today" />
                </filter>
            </field>
        </record>

    </data>
</odoo>