On-Call schedules end-time and export (#26903)

* On-Call schedules end-time and export

* Suggestions from Vale

* Apply suggestions from code review

PR review

Co-authored-by: Esther Kim <[email protected]>

---------

Co-authored-by: Esther Kim <[email protected]>

Author: Dalje-et

content/en/service_management/on-call/schedules.md

@@ -40,6 +40,7 @@ The **Final Schedule** is composed of all layers. Lower layers take precedence o
       - _One Week_ (168 hours)
       - _Custom_
    - **Handoff Time**: The date and time when shifts are swapped to the next person.
+   - **End time**: The date and time after which no more shifts are scheduled for this layer.
    - **Conditions**: Time conditions applied to each shift. This enables you to restrict the timeframe of on-call shifts. For example, Monday to Friday from 9:00 AM to 5:00 PM.
    - **Members**: The list of individuals who perform on-call duties. These individuals take shifts in the order in which you add them to the list.
 1. Select **Create**.
@@ -62,9 +63,36 @@ If you are part of an On-Call rotation, and you know that you will be out of off
 
 Other channel members can select **Take it** to schedule themselves to override your shift.
 
+### Export schedules
+
+The Export Shifts feature allows you to integrate your on-call schedule into your preferred calendar app (for example, Google Calendar, Apple Calendar, or Outlook) using a `.webcal` link. Whether you are part of multiple rotations, planning personal time around shifts, or aiming to increase team visibility, this feature ensures your on-call responsibilities are accessible and always up-to-date.
+
+#### Export and sync schedules
+1. To generate a `.webcal` link, go to the [**On-Call** > **Schedules**][1] section in your account.
+2. Select **Export My Shifts**. A link is auto-generated for you. 
+3. Hit **Copy Link**.
+4. After copying the link, use it in your calendar app. For example:
+    - Google Calendar: [Follow these instructions from Google (under 'Use a link to add a public calendar').][3]
+    - Outlook: [Microsoft's guide to subscribing to internet calendars.][4]
+    - Apple Calendar: [Learn how to subscribe to calendars on Mac or iPhone.][5]
+
+If your on-call schedule changes, updates are automatically reflected in the linked calendar, ensuring you always have the most accurate view of your responsibilities. If needed, revoke access to a previously shared link by generating a new one, which invalidates the old URL.
+
+Most calendar apps support notifications—enabled reminders to get alerts before your shifts start, but you can also configure shift reminders through SMS, push notification, and email in your [Datadog On-Call profile settings][6].
+
+#### Troubleshooting schedule exports
+
+If you encounter issues when exporting your On-Call schedule feeds to Google Calendar (such as "could not fetch URL) or Outlook ("Couldn't import calendar. Try again"), try the following fixes when initially subscribing to the calendar through URL:
+
+- Change `webcal://` to `http://` or `https://` at the beginning of the URL. For example, change `webcal://<your_personal_link>` to `http://<your_personal_link>`.
+
 ## Further Reading
 
 {{< partial name="whats-next/whats-next.html" >}}
 
 [1]: https://app.datadoghq.com/on-call/schedules
-[2]: https://app.datadoghq.com/on-call/schedules/create
+[2]: https://app.datadoghq.com/on-call/schedules/create
+[3]: https://support.google.com/calendar/answer/37100?hl=en&co=GENIE.Platform%3DDesktop
+[4]: https://support.microsoft.com/en-us/office/import-or-subscribe-to-a-calendar-in-outlook-com-or-outlook-on-the-web-cff1429c-5af6-41ec-a5b4-74f2c278e98c
+[5]: https://support.apple.com/en-us/102301
+[6]: /service_management/on-call/profile_settings/