My old accounts doesn't show anymore the switch to Remainders option but accounts created this year, consumer and G Suite accounts show both, Reminders and Task Calendars. I didn't searched yet for an official help article or post about this, but if you can't wait, look at the G Suite Update alert blogG Suite Update alert blog, the Google Calendar Help Center and the new Google Calendar Help Forum (https://support.google.com/calendar/communityGoogle Calendar Help Forum).
THIS IS OBSOLETE
To see the reminders,
- The reminders calendar should be enabled.
- The reminders will be shown on the corresponding day
To enable the reminders calendar,
- Click on the options button for the Task calendar
- Click on Go to Reminders