FAQ - Skyfield

Form Calendar is a Google Forms add-on that automatically opens and closes your forms based on Google Calendar events. Connect a calendar, and any event on it controls when your form accepts responses.

Is Form Calendar free?

Form Calendar offers a 7-day free trial with full access to all features. No credit card required. After the trial, a paid subscription is required to continue using the add-on. View pricing.

Where can I download Form Calendar?

Install directly from the Google Workspace Marketplace. No separate download required.

How do I access Form Calendar?

Open your Google Form, click the puzzle piece icon (Add-ons), and select Form Calendar. The add-on opens in a sidebar panel.

Does Form Calendar work on published forms?

Yes. You can configure schedules on published forms. Changes take effect immediately.

Will it slow down Google Forms?

No. Form Calendar works independently and doesn't impact Google Forms performance.

What happens if I disable Form Calendar?

When you disable the master toggle, all automatic schedules are paused. Your settings are preserved. If the form was closed by Form Calendar, it reopens automatically.

Calendar & Scheduling

How does scheduling work?

Connect a Google Calendar to your form. Any event on that calendar opens the form — when the event ends, the form closes. Recurring events are supported automatically.

Which calendar should I use?

Create a dedicated calendar for the form (the add-on offers a "Create" button). This keeps scheduling separate from your personal events. Any event on the connected calendar will open the form.

Can I schedule recurring events?

Yes. Add a recurring event to your connected Google Calendar. The add-on reads expanded event instances automatically — no extra setup needed.

How often does the scheduler check?

A background trigger fires at each event boundary (start/end). The add-on reads the Calendar API to determine the next state change and schedules a trigger for that exact time.

What happens if I edit calendar events?

Changes are detected on the next trigger fire or when you open the sidebar. There may be a brief delay before edits take effect.

What happens if I manually open a form that was closed by schedule?

If Form Calendar is enabled and no calendar event is active, the form will close again at the next trigger. To keep it open, either disable the add-on or add a calendar event.

Why are my calendar events merged?

Google limits how often add-ons can check for changes — at most once per hour. When two calendar events are less than 1 hour apart, the form can't close and reopen between them. Instead, they're treated as one continuous window:

Calendar

Event 1

Event 2

9–9:3010–10:30

Actual

Single combined event

9:00 — 10:30

Calendar events

Merged window

Events less than 1 hour apart are combined into one window.

This also means response limits and notifications apply to the merged window as a whole.

What about short events (under 1 hour)?

Due to the 1-hour trigger spacing constraint, the form stays open for approximately 1 hour even if the calendar event is shorter. The form will close at the next available trigger opportunity.

Response Limits

How do response limits work?

Set a maximum number of responses per calendar event window. When the limit is reached, the form closes automatically. The count resets for each new event window. If events are less than 1 hour apart, they merge into one window and share the same limit.

Where do I configure response limits?

In the Calendar tab, click the "Limit form responses" row. Toggle the switch on and set the maximum number of responses.

Notifications

What notifications does Form Calendar send?

How do I configure notifications?

Who receives the notifications?

Only the email address you configure. By default, this is the form owner's email.

What happens if my connected calendar is deleted?

Troubleshooting

I cannot find the add-on after installation

Open any Google Form, click Add-ons in the menu, and select Form Calendar. If missing, try refreshing the page or reinstalling from the Google Workspace Marketplace.

The add-on isn't appearing in my form

Try refreshing the page or reinstalling the add-on from the Google Workspace Marketplace.

Why don't I see "Open" in the Add-ons menu?

Google controls which add-on options appear in the dropdown. This can vary based on browser, cache, or Google's server-side state. Try:

I'm not receiving notifications

Check your spam folder. Ensure you enabled notifications in the add-on settings and entered the correct email address.

Important: Notifications are sent via Google's servers on behalf of your email address. If your email domain has strict DMARC/SPF policies (common with custom domains like iCloud Mail, ProtonMail, or corporate email), messages may be rejected. Use a Gmail address for notifications to avoid this issue.

My form didn't open/close at the right time (timezone)

Check your Google account timezone settings. Form Calendar uses your account's timezone for scheduling.

Can I edit or delete my settings?

Yes. All schedule settings are fully customizable and can be removed anytime through the add-on interface.

Can I use Form Calendar with multiple editors?

Yes. Settings are stored with the form. Multiple editors can access the add-on, but simultaneous edits may cause conflicts.

Does Form Calendar work on mobile?

The add-on works in the Google Forms web interface on desktop browsers. Mobile browsers have limited add-on support.

Permissions & Privacy

Is my form data stored externally?

No. All settings are stored at Google. Form Calendar does not transmit your form data or responses to external servers.

Can Form Calendar read all my forms?

No. The add-on uses the "currentonly" scope, meaning it can only access the specific form you opened it from.

Why does the add-on need calendar access?

The add-on reads your Google Calendar to determine when to open/close the form. It uses read-only calendar access — it cannot modify your events.