calendar_holiday/data/calendar_holiday_data.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data noupdate="1">
        <record forcecreate="True" id="ir_cron_hr_contract_calendar_action" model="ir.cron">
            <field name="name">Generate calendars in contracts</field>
            <field eval="False" name="active" />
            <field name="user_id" ref="base.user_root" />
            <field name="interval_number">12</field>
            <field name="interval_type">months</field>
            <field name="numbercall">-1</field>
            <field eval="'hr.contract'" name="model" />
            <field eval="'automatic_process_generate_calendar'" name="function" />
            <field eval="'(None, )'" name="args" />
        </record>
    </data>
</openerp>