Hii,

Full Working Example in Odoo 17

Custom JavaScript Widget

/** @odoo-module **/

import { registry } from "@web/core/registry";

import { DateTimeField } from "@web/views/fields/datetime/datetime_field";

export class RestrictedDateTime extends DateTimeField {

    /**

     * Override flatpickr options to restrict the date range

     */

    _getFlatpickrOptions() {

        const options = super._getFlatpickrOptions();

        return {

            ...options,

            minDate: "2025-08-01",

            maxDate: "2025-08-31",

        };

    }

}

// Register the widget

registry.category("fields").add("restricted_datetime", RestrictedDateTime);

Assign the Widget in XML View

You need to use your new widget restricted_datetime on the datetime field:

<field name="your_datetime_field" widget="restricted_datetime"/>

i hope it is usefull

Hi,

Try with the following code.

Python

from_period = fields.Date(string="From Date", required=True,
                          help="Choose the from date")
to_period = fields.Date(string="To Date", required=True,
                        help="Choose the to date")

XML

<label for="from_period" string="Period"/>
<div class="o_row">
    <field name="from_period" widget="daterange" nolabel="1"
           class="oe_inline"
           options="{'related_end_date': 'to_period'}"/>
    <i class="fa fa-long-arrow-right mx-2"
       aria-label="Arrow icon" title="Arrow"/>
    <field name="to_period" widget="daterange" nolabel="1"
           class="oe_inline"
           options="{'related_start_date': 'from_period'}"/>
</div>

Hope it helps

Hi Kedar Dave, 

Use 

<field name="date_begin" widget="daterange" options="{'related_end_date': 'date_end'}"/>
<field name="date_end" widget="daterange" options="{'related_start_date': 'date_begin'}"/>

Hope this help.