Wedding Checklist: What to Do 18, 12, 6, and 3 Months Before the Big Day

You just got engaged. Congrats. And now you're panicking because you don't know where to start and feel like there are 10,000 things to do.

Spoiler: yes, there's a lot to do. But not all at once. And honestly? 80% of the checklists you'll find online are pure filler. "Choosing menu paper" a week before the wedding? That can wait.

Here is the real checklist. What you actually need to do at 18, 12, 6, and 3 months. Nothing more. The rest is detail that falls into place on its own if you have these fundamentals locked down.

1. At 18 Months Out: Dream and Decide

This is the "what are we actually doing" phase. Few people will tell you this, but this is where most regrets are decided.

Essentials (actually do these)

Discuss the vision together

This should take one evening, tops. A beer, a conversation, write down the answers. That's your foundation.

Set your real priorities

Write this down. Literally. It will guide every decision from here on out.

Talk to out-of-town or international guests

If you're getting married in Corsica and have guests traveling from Alsace, let them know early. It gives them time to plan, request time off, and sort travel.

What you can do (not mandatory at 18 months)

What you must ABSOLUTELY ignore at 18 months

2. At 12 Months Out: Build the Structure

This is the heavy lifting. By this point, you need your three pillars booked: venue, caterer, photographer. That's 70% of your budget, so start there.

Essentials (really do these)

Research and visit venues

Deadline: have the venue booked by the end of the month.

Find caterers and taste their menus

Deadline: choose and sign with your caterer within 2–3 months.

Find a photographer

Deadline: book within 2 months. Good photographers fill up fast.

Discuss music and atmosphere

Deadline: decide before the 6-month mark.

Talk through practical plans with your partner

Helpful things (but not mandatory)

What you must ABSOLUTELY ignore at 12 months

3. At 6 Months Out: Refine and Confirm

At this stage, the big pieces are locked in. Now you refine the details without creating chaos.

Essentials (really do these)

Send your invitations

Confirm with all vendors

Buy your dress

Create your registry (if you want one)

Formally plan the ceremony

Write this into a document for the officiant or celebrant.

Create a landing page or private group for practical info

Helpful things

What you must ABSOLUTELY ignore at 6 months

4. At 3 Months Out: The Finishing Touches

At this point, 95% of the work is done. It's all fine-tuning.

Essentials (really do these)

Recount confirmed guests

Finalize menus

Confirm details with the photographer

Finalize your playlist (or hand it to your DJ)

Build the exact day-of timeline

Share this with the venue, caterer, photographer, DJ, your parents, everyone. Everyone needs to be on the same page.

Finalize decor

Prepare the extras

Check insurance and legal requirements

Helpful things

What you must ABSOLUTELY ignore at 3 months

5. At 1 Month Out: Breathe

At this point, everything is done. Seriously. You can relax.

Essentials (really do these)

Final confirmations

Final wardrobe checks

Last-minute invites

Did you forget anyone? Now is the time to call them directly if urgent.

Final practical details

What you must ABSOLUTELY ignore at 1 month

6. At 1 Week Out: Check and Unwind

Essentials (really do these)

Final check-ins

Practical run-throughs

And that's it

One week before the wedding, you should have ZERO tasks left except getting into the right headspace.

7. On the Wedding Day: Have Assigned Roles

You should not be coordinating your wedding on the day itself. That's impossible and unnecessary.

Assign roles ahead of time

Vendors know what they're doing. The venue knows the drill. Your only job is to relax.

What Mariable Recommends

A wedding checklist should be straightforward and aligned with real vendor booking timelines — not arbitrary dates found on random blogs.

Mariable recommends:

The real rule? When you follow this checklist, 95% of the stress disappears. You don't need perfection. You need foresight and clarity.

FAQ

What if I don't book vendors at 12 months?

Top photographers and venues book out 12–18 months in advance. Waiting will add stress, and you might miss your first choice. Seriously, lock down key vendors at 12 months.

Can I use a shorter checklist?

Honestly? Pretty much. There are three non-negotiables: make your decisions, book your vendors, send your invitations. Everything else builds on top of those.

How do I use this checklist with less than 12 months to plan?

Compress the timeline. Have 6 months? Tackle the "12 months" tasks this coming month. Have 3 months? Do the "18 months" tasks now, and the "12 months" tasks in 2 weeks. It's completely doable, just tighter.

Do I really need to buy the dress at 6 months?

Yes, seriously. Alterations alone take 4–8 weeks. If you buy at 3 months and hit a snag (wrong size, backordered fabric), you're in a scramble. Six months gives you breathing room.

What if I change my mind about something 1 month out?

Think twice. Most changes at 1 month out stem from anxiety, not genuine necessity. Want to tweak a menu item? Sure. Want to redesign the entire venue aesthetic? Definitely not.

How do I handle last-minute guest changes?

If someone cancels 2 weeks out, it's fine — just update the caterer. If someone tries to add two guests at the last minute, say no. Caterers need fixed numbers and venues have strict capacities; those don't change two weeks before the wedding.

Conclusion

A wedding checklist should be a roadmap, not a trap. This checklist tells you when to tackle the real priorities, in the right order, so you avoid unnecessary surprises.

At 18 months: decide. At 12 months: book. At 6 months: confirm and refine. At 3 months: finalize. At 1 month: breathe. Wedding day: enjoy.

It's really that simple.

Mariable gives you the structure and templates to navigate every step — so you know exactly what to do, in the right sequence, without missing what matters. No panic. No endless lists. Just what counts.