Google has kept this feature turned on by default, however, it can be disabled on the domain by admins. In case the feature is left on by the admin, the feature will be off for the end-user by default and will come with the option to enable it on a per device basis. Therefore using this functionality entails a process on the part of the end user.
If you want to enable this option so you can access your Google Calendar offline via PC, then this is what you need to do:
Open Google Calendar.
In the top right, click Settings Settings and then Settings.
On the left, under “General,” click Offline and then Turn on offline calendar.
Click Reload now.
While the Google Calendar is syncing for offline use, you will see an icon in the top right of your calendar. When the sync is complete, your calendar’s status shows Ready for offline and when you’re offline, your calendar’s status shows as Offline.
Readers must note that when this feature is enabled, they can view their calendar and events from four weeks prior or any time in the future by week, day, or month.