From your mobile device:

Use the "Email me this link" above to send the iCal Feed URL to your mobile device
Open the email you just sent
Copy the URL from the email for the feed that you want to sync (don't open the link, press & hold to copy it)
Open the iPhone/iPad's Settings app
Tap Mail, Contacts, Calendars
Tap Add Account
Tap Other
Tap Add Subscribed Calendars
Paste in the copied URL
Tap Next
Tap Save
Tap out of the Settings app to the home screen
Open the Calendar app and navigate to the day/s that you have enrolled or bookmarked sessions

Note: Agenda changes may take up to 60 minutes to appear in the iCal feed.

Don't see the changes you recently made? Refresh your calendar:

Open the Calendar app and tap on the word Calendars at the bottom of the main calendar screen
Pull the page down to refresh

Click Copy to Clipboard (found above)
Open the Calendar application on your Mac
In Calendar, choose File > New Calendar Subscription...
Paste in the calendar's URL (from the fist step above) - then click Subscribe and set Auto-refresh to Every Hour
Click OK
To view your agenda, navigate to the day/s that you have enrolled or bookmarked sessions

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Explore sessions from TrailheaDX 2019.