How do I word a 40th birthday invitation?

A 40th birthday invitation needs five things in this order: who's turning 40, the kind of party (dinner, cocktails, surprise), the date and start time, the venue, and how to RSVP. Lead with a line that sets the tone — warm and classic, cheeky, or black-tie elegant — then let the details follow cleanly underneath.

Now make the invitation →

The five details every 40th invitation needs

Guest of honor, occasion, date, time, and place — then an RSVP line with a reply-by date. Everything else (dress code, parking, 'no gifts') is optional and belongs in a smaller note at the bottom so the essentials stay scannable. If it's a surprise, put the arrive-by time front and center and say 'shhh' explicitly.

Set the tone in the first line

The opening line does the heavy lifting. 'Four decades, one very good excuse to celebrate' reads playful; 'Please join us in honour of Sarah's fortieth birthday' reads formal. Pick the register that matches the party — a backyard BBQ and a black-tie dinner should not use the same words.

Handle the milestone gracefully

You don't have to shout '40' if the guest of honor is sensitive about it — 'a milestone celebration' or spelling out 'the fortieth' softens it. If they love it, lean in: 'Fabulous at 40' and gold everything.

Copy-ready examples

Classic
Please join us to celebrate
Sarah's 40th Birthday
Saturday, the fourteenth of June at seven o'clock
The Astor Room · 40 Prince Street
Kindly reply by June 1

Playful
Sarah's turning 40 — and we're making a thing of it
Dinner, drinks, and questionable dancing
Saturday, June 14 · 7 PM
The Astor Room
RSVP so we know how much cake to order

Elegant
In honour of Sarah's fortieth birthday
you are cordially invited to an evening of
cocktails and dinner
Saturday, the fourteenth of June · half past seven
The Astor Room · Black tie optional · RSVP by the first of June

Questions

Do you put an end time on a birthday invitation?

Only if it matters (a venue booking that ends, or a school-night crowd). Otherwise a start time is enough — an end time can read as 'please leave by.' For a surprise, include the arrive-by time instead, so guests are seated before the guest of honor walks in.

How far in advance should a 40th birthday invitation go out?

Three to four weeks for a normal party; six weeks or more if it's a weekend away, a holiday date, or people are traveling. Send a save-the-date first if the date is unusual or travel is involved.

Skip the blank page.

Describe your event in one sentence — RevelPost designs the invitation, verifies the details, and runs the RSVPs.

Now make the invitation →