I often set reminders in Google Calendar on the Android version, but when I check my Calendar on the web, those reminders are nowhere to be found. Even though this article states it should have been possible in 2016: https://blog.google/products/calendar/reminders-come-to-google-calendar-on-the-web/
I also checked the web version of Google Keep, since Calendar reminders seem to have a strange symbiotic relation with Google Keep notes, but my reminders aren't there either.
Maybe asking for a way to add reminders is too much, but I'd really like to at least be able to view my reminders without relying on a specific device.
Edit – My "creation dialog" also looks different from Walt's: there is no input for selecting reminder:
Best Answer
Normally reminders are shown in Google Calendar along with events:
and are created in the same way, by selecting "Reminder" on top of the creation dialog:
Troubleshooting:
Check the list of "My Calendars" to make sure that Reminders are selected there.
You may be experiencing a transient issue with reminders not showing up in the web version of Google Calendar. (I had this a couple of days ago). If so, all you can do is wait until the hiccup passes.