Dynamics 365 - Migrate Calendar from One Environment to Another

To move the calendars from one environment to another using Data Transporter in XrmToolbox, you can use the following filter:

<filter type="and">
    <condition attribute="type" operator="in">
        <value>1</value>
        <value>2</value>
    </condition>
</filter>

1 = Service Calendar
2 = Holiday Calendar

Full fetch xml to view calendar entries is as following:

<fetch distinct="false" mapping="logical" output-format="xml-platform" version="1.0" >
    <entity name="calendar" >
        <attribute name="name" />
        <attribute name="typename" />
        <attribute name="type" />
        <attribute name="primaryuserid" />
        <attribute name="isshared" />
        <attribute name="holidayschedulecalendaridname" />
        <attribute name="holidayschedulecalendarid" />
        <attribute name="description" />
        <attribute name="businessunitid" />
        <order descending="true" attribute="type" />
        <filter type="and">
            <condition attribute="type" operator="in">
                <value>1</value>
                <value>2</value>
            </condition>
        </filter>
    </entity>
</fetch>

Other useful links:

https://365lyf.com/migration-of-slas-in-dynamics-365/

https://alexanderdevelopment.net/post/2016/03/04/moving-dynamics-crm-calendar-records-with-the-configuration-data-mover/
https://blog.magnetismsolutions.com/blog/isaacnichols/2020/06/22/retrieving-a-holiday-calendar-in-a-dynamics-365-plugin