How to Connect Google Calendar and Mailchimp for Event Promotion

You’ve got an event on the calendar. You’ve got an email list in Mailchimp. But between the two tools, there’s a gap that’s costing you time — and attendees.

Every time you add a new event to Google Calendar, someone still has to manually fire up Mailchimp, write a campaign, add the date, the location, the link, and schedule it out. That’s not a process. That’s just friction.

The good news? You can bridge Google Calendar and Mailchimp so they work together automatically. When a new event is created, your promotional email practically writes itself. No copy-pasting. No missed sends. No scrambling the night before.

This guide walks you through every method — from no-code automations to native Mailchimp features — so you can pick the one that fits your setup and start promoting events like clockwork.

Why Connecting These Two Tools Changes Everything

Before diving into the how, it’s worth understanding what you’re actually unlocking.

Email remains the single most powerful channel for event promotion. Email marketing generates $36 for every $1 spent — a 3,600% ROI that outperforms virtually every other digital marketing channel. More critically for events, 58% of users check their email first thing in the morning, meaning a well-timed event announcement is often the very first thing your audience sees in their day.

When it comes to reaching people before an event, email pulls ahead of every other channel. 52% of consumers made a purchase directly from an email in 2024, and 59% say marketing emails influence their purchase decisions — data points that translate directly into event registrations when your campaigns are timely and relevant.

The problem isn’t email. The problem is the manual process of keeping your calendar and your email platform in sync. Teams that automate this connection don’t just save time — they send more emails, promote more consistently, and fill more seats. Automated emails generate 320% more revenue than manually executed campaigns, and they account for just 2% of email sends while driving up to 37% of all email-generated revenue.

That’s the gap you’re closing when you connect Google Calendar to Mailchimp.

What You Can Automate With This Integration

Understanding what’s possible helps you decide which method is worth setting up. Here’s what a Google Calendar + Mailchimp connection lets you do:

Trigger a Mailchimp campaign draft the moment you create a new event in Google Calendar — so you’re never starting from a blank screen.

Add attendees to a Mailchimp audience automatically, so everyone who RSVPs gets added to your list and tagged for follow-up sequences.

Pull upcoming events into your newsletter using dynamic merge codes that update automatically — no manual copy-pasting of event details ever again.

Log your Mailchimp campaign dates back into Google Calendar so your whole team can see exactly what’s going out and when.

Send reminder emails based on event proximity, so registrants get a nudge 7 days out, 3 days out, and the morning of — all on autopilot.

Each of these workflows compounds. The teams running them aren’t just more efficient — they’re more consistent, which is ultimately what drives attendance numbers up over time.

Method One — Using Zapier to Connect Google Calendar and Mailchimp

Zapier is the most flexible way to connect these two platforms without writing a single line of code. It works by creating “Zaps” — automated workflows with a trigger and an action. When something happens in one app, something else happens in the other.

Setting up your first Zap:

Log in to Zapier and click “Create Zap.” In the trigger step, search for Google Calendar and select it as your trigger app. Choose “New Event” as the trigger event — this fires the workflow whenever you create a new event in your calendar. Connect your Google account and select which calendar to monitor.

In the action step, search for Mailchimp. Choose “Create Campaign Draft” as your action. Connect your Mailchimp account, then map the Google Calendar data — event name, date, location, description — to the campaign fields. This means every new event automatically creates a ready-to-customize campaign in Mailchimp.

Click “Test,” verify the data looks right, and publish the Zap.

Other powerful Zap combinations to consider:

You can also set up a Zap where a new Google Calendar event triggers “Add Subscriber to List” in Mailchimp — useful if you’re collecting registrations through a form that syncs to your calendar. Or flip it entirely: when a new Mailchimp campaign is scheduled, automatically add that send date to your Google Calendar so your team always knows what’s going out.

Zapier connects Google Calendar and Mailchimp in minutes and supports over 8,000 apps, so you can build out more sophisticated workflows as your event marketing matures.

Method Two — Using the Events in Campaigns Plugin

If you run a WordPress website alongside your Mailchimp list, the Events in Campaigns approach gives you something genuinely powerful: a dynamic merge code that pulls your next 60 days of Google Calendar events directly into any Mailchimp campaign template.

How to set it up:

Start by making your Google Calendar public. In Google Calendar, hover over the calendar you want to share, click the three-dot menu, then go to Settings and Sharing. Under “Access permissions for events,” check “Make available to public.” Scroll down to “Integrate calendar” and copy the Calendar ID — you’ll need this in the next step.

Install the Events in Campaigns plugin on your WordPress site and paste in your Calendar ID. Configure how you want events to display — title, date, location, description — then save your settings as a template.

The plugin generates a Mailchimp merge code. Copy that code, go to your Mailchimp campaign editor, and paste it into a text block. When you enter Preview mode, you’ll see your upcoming calendar events automatically populated — exactly as they’ll appear in the email.

From this point forward, you never have to manually update event details in your newsletter. Add a new event to Google Calendar and it appears in your next campaign automatically. The merge code handles the rest.

Method Three — Mailchimp’s Native “Add to Calendar” Link Feature

Mailchimp has a built-in feature that lets you add “Add to Calendar” links directly inside your email campaigns. This isn’t an integration in the traditional sense — it’s a way to let your subscribers save your events to their calendars with a single click.

Why this matters for attendance:

When someone adds an event to their personal Google Calendar from your email, they get automatic reminders from that calendar app. That’s an extra touchpoint you don’t have to engineer — every subscriber who clicks creates their own reminder system, reducing no-shows without any ongoing effort on your end.

How to add it:

Inside your Mailchimp campaign editor, highlight the event date or a call-to-action button. Click the link icon in the toolbar. In the dropdown, select “Calendar Event.” Fill in the event name, start date and time, end date and time, location, and a description. Mailchimp generates links for Google Calendar, iCal, and Outlook simultaneously, giving your subscribers options regardless of which calendar app they use.

This feature works best as a complement to the automation methods above. Use Zapier or Events in Campaigns to automate your sending workflow, and use native calendar links to help subscribers remember to show up.

Method Four — Albato and Other No-Code Automation Platforms

Zapier isn’t the only automation tool that bridges Google Calendar and Mailchimp. Albato is a strong alternative — roughly 30% cheaper for similar functionality and equally simple to configure with no technical skills required.

The setup logic is identical: define a trigger in Google Calendar (new event created), define an action in Mailchimp (add subscriber, create campaign, or tag a contact), and map the data fields between them. Albato’s interface makes this straightforward, and it includes a 7-day free trial if you want to test the workflow before committing.

For teams already using Make (formerly Integromat) or n8n, both platforms support Google Calendar and Mailchimp connections through similar trigger-action structures. The choice of platform comes down to your existing tech stack and budget.

Method Five — Direct API Integration

For teams with technical resources, connecting Google Calendar and Mailchimp directly through their APIs gives you complete control. You can build exactly the workflow you need without being constrained by what a third-party automation platform supports.

The Google Calendar API lets you read event data in real time. The Mailchimp API lets you create campaigns, manage audiences, add subscribers, and trigger automated sequences. By integrating both, you can build custom workflows — for example, automatically creating a multi-email event sequence in Mailchimp based on the event date in Google Calendar, with different messaging depending on how far out the event is.

This approach requires development work upfront but eliminates ongoing platform subscription costs and gives you complete flexibility as your event marketing strategy scales.

How to Build an Event Email Sequence That Actually Drives Attendance

Connecting the tools is only half the job. What you send matters just as much as when it sends.

The average email open rate rose for the fifth consecutive year to 30.7% in 2025. For event-specific emails, the stakes are higher — you’re not just trying to generate a click, you’re trying to get someone to carve out real time in their day and show up.

Here’s a proven sequence structure:

Announcement email — 2 to 4 weeks out. This is your first send after the event is created. Lead with what the event is and why it’s worth attending. Make the value clear in the subject line. Be specific about what attendees will walk away with.

Reminder email — 1 week out. Shorter and more urgent. Reinforce the value, add any new details, and make sure the registration or calendar link is front and center. Personalized subject lines increase open rates by 20–26%, so pull in the subscriber’s first name if your Mailchimp audience has it.

Last-chance email — 24 to 48 hours out. Brief, direct, and urgent. A single clear call to action. This email typically earns the highest click-through rate of the sequence because it catches people who’ve been meaning to register but haven’t yet.

Day-of reminder — morning of the event. For virtual events, include the joining link prominently. For in-person events, include directions or parking details. This email doesn’t need to sell anything — its job is to reduce no-shows from people who already registered.

Post-event follow-up — within 24 hours. Thank attendees, share resources or recordings, and set up the next engagement. This email has a critical function: turning event attendees into ongoing relationships. Transactional and follow-up emails achieve 8x higher opens and clicks compared to standard marketing campaigns.

Segmenting Your Mailchimp Audience for Better Event Promotion

Not every subscriber on your list is equally relevant for every event. Sending to your entire list every time reduces open rates, increases unsubscribes, and dilutes your event marketing over time.

Use Mailchimp’s segmentation tools to build targeted groups before you send. Segment by location if the event is in-person. Segment by previous event attendance if you’re running a recurring series — past attendees convert at higher rates. Segment by engagement level to target your most active subscribers first.

Segmented email campaigns see 27% higher unique click rates than non-segmented ones. For event promotion, where you’re asking for a real commitment of time, targeting the right people is the difference between a waitlist and empty seats.

Tags are particularly useful here. When someone registers for an event through your Mailchimp form, tag them with the event name. After the event, use that tag to exclude them from “reminder to register” emails and include them in the post-event follow-up sequence instead.

Common Mistakes That Kill Event Email Performance

Sending only once. A single email announcement almost never maximizes attendance. Most people need multiple touchpoints — the announcement, a reminder, a last-chance email. Teams that send a sequence consistently outperform those that send a single blast.

Generic subject lines. “Don’t miss our upcoming event” performs far worse than “[First Name], our [Event Name] is filling up fast.” Specificity and personalization combined can move open rates dramatically. Personalized emails achieve a 29% open rate versus the industry average, and a 41% click-through rate.

Not mobile-optimizing. 55% of email opens occur on mobile devices. If your event email requires pinching and zooming to find the date and registration link, you’re losing registrations before people even finish reading. Use Mailchimp’s mobile preview before every send.

Forgetting the calendar link. If someone opens your email and wants to attend but doesn’t register immediately, they need a way to save the date. Adding a one-click “Add to Google Calendar” link creates a safety net for interested-but-busy subscribers.

Ignoring deliverability. Even the best event email can’t work if it lands in spam. The average bounce rate across all industries in 2024 was 2.33%. Keep your Mailchimp list clean, remove inactive subscribers regularly, and never send to cold or purchased lists. 80% of users say they would mark an email as spam if it appears suspicious — trust and sender reputation matter more than any subject line tactic.

Tracking What Works and Improving Over Time

Once your Google Calendar and Mailchimp connection is live, the data starts flowing. Use it.

Track open rates by event type to learn which kinds of events your audience cares about most. Track click rates on calendar links versus registration links to understand where drop-off happens. Track attendance rates versus email open rates to understand how many people who opened your announcement actually showed up.

Email campaign click-to-conversion rates grew by 27.6% in 2024. The people who engage with your emails are increasingly likely to take action — which means your job is simply to get the right email in front of the right person at the right time. The conversion tends to follow.

Set up Mailchimp’s reporting dashboard to monitor each campaign’s performance after it sends. Document open rate, click rate, and attendance for every event. Over time, patterns emerge — and those patterns become your repeatable playbook.

Conclusion

Connecting Google Calendar and Mailchimp turns event promotion from a reactive scramble into a systematic process. Whether you use Zapier to trigger campaign drafts automatically, merge codes to pull event details into newsletters dynamically, or Mailchimp’s native calendar links to help subscribers remember to show up — the outcome is the same: more consistency, less manual work, and more people in the room.

Email is still the highest-ROI channel for event promotion. With a 3,600% average return on investment, a subscriber base checking their inbox first thing every morning, and automation tools that do the heavy lifting for you, there’s no reason to keep managing this manually.

Set up the integration once. Run the sequence every time. Watch your attendance numbers climb.