A spreadsheet is simply a table-style file — it can be either a CSV or a Google Sheets document.
We’re currently working on a feature that will allow importing events from CSV files. I’ve updated the thread title to make this clearer.
This feature will let you import events from a file, but please note that any new events added to the file later won’t be automatically synced with the widget.
From what I understand, you’d like to automate the process so that when users submit events through a form linked to Google Sheets, those events automatically appear in your Event Calendar widget.
If that’s the case, the Sync events to Google Sheet idea is the perfect match for your use case — feel free to upvote it 