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Holidays, Birthdays and More – 20+ Letters to Customers for Special Occasions

There is no one right day (or way!) to send a letter to a customer. However, holidays and special occasions can be a great opportunity for your business to reach out.

Holiday letters are an excellent way to keep customers up-to-date, send out promotions, and show customers you care. And writing personalized letters to customers on their special days – such as birthdays or anniversaries – can set your company apart from the competition and help and you build business relationships that could last a lifetime.

Here are 20+ letters you can use for special occasions to start up a personalized and special interaction with your customers.

Letters for Special Occasions (Birthdays and More)

Happy Birthday

Birthdays are one of the most popular occasions to reach out to customers. That’s because birthdays are unique days that make customers feel special – it’s the one time of year that is truly all about them.

Customers’ birthday information is incredibly easy to collect – some customers will even seek out companies that offer birthday perks and subscribe to several marketing emails before their special day.

Companies that write birthday letters to customers commonly get a return in the form of word-of-mouth advertising and sales. Here are a few ways that you can wish your customers a happy birthday and make them feel like the center of your world.

– Happy Birthday from Your Corporate Family
To generate customer loyalty, it’s important to make customers feel like they are a valued part of your organization. Here’s how you might use a birthday letter or card to make your customers feel more connected to your brand:

Dear Christopher,

It’s time to get happy! Wishing you all the best on your birthday, and everything wonderful in the year ahead.


Your Sporting Supplies Family.

By signing this letter off with “Your Sporting Supplies Family,” this brand manages to create a sense of warmth and relationship with the customer, showing them they care while also making them feel like a valued part of something bigger (such as a family unit).

– On-Brand Happy Birthday
Birthday letters don’t have to be generic. On-brand birthday cards can make your customer smile, while evoking your brand’s image and stimulating a desire to shop.

Dear Maribelle,

We wanted to wish you the happiest of birthdays on your special day. May all your years be full of happiness, success, good health, and warm feet!


Your Friends at Socks R Us

This company’s on-brand birthday letter is charming and original, while also reminding the customer of their product.

– Thanks for Being a Customer on Your Birthday
Being thankful for your customer never goes out of fashion. Tell your customers how much you appreciate them in a birthday letter, and they will return the favor in the form of repeat business.

Dear Anna,

Wishing a cherished client and friend a very happy birthday celebration. Our business has been on the up-and-up because of great clients like you. On your special day, we have just two strong and sincere words for you – Thank You.


Tina Cohen

– Silly Happy Birthday to a Customer
Happy birthday letters don’t always have to be so formal, or full of accolades. Use humor in your happy birthday card to show your customers that you’re not afraid to have a bit of fun with them.

Dear Ashley,

Happy birthday! Wishing you another 365 days of an all-inclusive trip around the sun!

Yours Truly,


Make sure that your sense of humor is enjoyable and lighthearted, so that it won’t offend sensitive customers. Then send away!

– Happy Birthday to Our Favorite Customer
All customers are valuable to a business. Still, you can make your recipient feel special on their birthday by calling them what they are: your favorite customer!

Dear Jim,

Happy birthday to our favorite client! Seriously. You’re the best. And our absolute favorite. (Just don’t tell Bob…)


The Software Team

As this example shows, a little bit of flattery can go a long way. Use humor to ward off customer disbelief and make this birthday letter more playful.

– Happy Birthday with a Coupon/Freebie/Gift
Birthday gifts, free items, and coupons are a great way to show your customer that their birthday matters to you while also creating an opportunity for them to buy. The promise of discounts and free items draws customers (and often their friends) into your business, which may not have otherwise been on their agenda. This sets them up to make additional purchases, outside of the initial incentive that was offered.

Dear Allen,

Hurrah! Hooray! Happy birthday!

Since it’s your big day, we feel like you deserve a treat. Although we couldn’t send you a cake, we’d like to offer you a free ice cream sundae!

You can pick up your sundae at any one of our locations. Just print out this email (or show it on your phone!) to redeem it. This offer expires in one month.


Dan & Jan’s Ice Cream Shop

Include freebies in your birthday letter and you may find yourself with a boost in sales – and eager subscribers. Let customers know when the offer expires, and they will approach your business more quickly.

Letters for Non-Birthday Milestones

Depending on what service your company provides, and how close your relationship is with your customers or clients, you may be able to offer more than just birthday wishes.

Some of the other well-wishes you might want to give customers are:

  • Happy Anniversary
  • Congratulations on your Newborn (becoming a parent or a grandparent)
  • Congratulations on Graduating
  • Congratulations on your Promotion

Here are some examples of non-birthday special occasions that you can celebrate with your customer.

– Congratulations on Graduating
If your company works in a special event industry, consider sending customers (or prospective customers) a letter like this one on their special day:

Dear Eva,

Congratulations on graduating! We are confident that today is just one of many successful moments that life has in store for you. Whatever you do, never stop learning, exploring, growing and challenging yourself to be your best.

And we at Studio 45 are grateful to have been a part of this important day. Your graduation photos are almost done being processed, and will be available for viewing and purchase by the end of this week at this link: LINK.

If you any questions, comments, or concerns about the images or any of the products that we offer, don’t hesitate to contact us.

Thank you,

Roxane Simon

Studio 45 Events

Use letters of congratulations for special occasions to commend your customers, while also giving them relevant information, if necessary.

– Congratulations on Your Promotion
Promotions are a great reason to send letters of congratulations to your B2B correspondents. Here is an example of how you might do that:

Dear Harry,

I heard from Jeff that you were promoted to Vice President. Congratulations! As someone so dedicated and hardworking, you deserve this recognition and responsibility. And the position deserves someone as outstanding as you!

I wish you the best for your career and look forward to our next chat!


By keeping up with LinkedIn and staying in touch with your B2B executive contacts, you will be able to congratulate clients for personal milestones and build tighter bonds.

Letters for Holidays

You may not always be aware of the special occasions that are going on in your customers’ lives. And that’s okay – fortunately, you can still write letters to them on holidays.

Holidays are a prime opportunity for companies to connect with their customers. Unlike birthdays, most holidays are on set, easy-to-remember dates, and are observed by mass numbers of consumers at a time. From sales to retention to sharing corporate updates, holiday letters can fulfill a number of corporate needs. Here are some ideas of holiday letters that you can send to customers, in the order that they occur.

Happy New Year

Happy New Year wishes often get lumped in with general holiday letters. However, they also work well as standalone correspondences. Here’s an example of how you can use a Happy New Year letter to customers to keep interested parties up to date on business happenings and show them your positive intentions for the new year.

– Happy New Year Business Update
A New Year’s letter to customers from a business decision maker or CEO can be a powerful way for companies to start the new year. Below is an example of how that might be done:

Dear Rachel,

Happy New Year! Thank you for being such an important part of our organization in 2017. Last year we managed to introduce a brand new Chatbot into our features set. We announced a new Facebook and Twitter integration that has redefined the abilities of our Live Chat product.

We introduced Audio and Video chat to help our clients deliver a more personalized customer experience.

And, we listened to you – our valued customer. In 2017, your feedback helped us optimize our product all around, such as by improving the interface of our Live Chat mobile aps and adding new chat buttons and invitations.

We are committed to continue listening, improving, and to raise the bar even higher in 2018.

We thank you for your loyalty, and look forward to continuing our relationship into the new year!


Adam Rogers


By outlining your company’s past accomplishments and present goals, you can show your customers how you’re growing as a company, while also keeping them in the loop.

– New Year, New Customer Service
You don’t have to be a high-powered executive to write a heartfelt New Year’s letter that your customers will appreciate. You can also write a meaningful letter outlining your department’s objectives for the coming year:

Dear Sophie,

We work hard every day to provide you with the best service possible, and we will work even harder this New Year.

Thanks for being such an awesome customer! Yours truly,


Valentine’s Day

Like birthdays, Valentine’s Day is another day you can tell your customers just how much they mean to you. Use these example Valentine’s Day letters to sweep your customers off their feet.

– We Love our Loyal Customers!
Valentine’s Day is about love, and what business doesn’t love their customers? Here is a simple way you can tell your longtime customers that you love them:

Dear Gabriella,

We love our customers, and its customers like you that make us love what we do. Thank you for being a loyal member of our cold-blooded family!

Wishing you the happiest of Valentine’s Days,

Your friends at Reptiles Galore

– Valentine’s Day Wishes for a New Customer
Got some new subscribers to your email list? Here’s a promotional Valentine’s Day letter that you can send to new customers:

Dear Andrew,

We would have sent you some chocolates and roses for Valentine’s Day, but we want to take things slow (I know, we’re not there yet!). Instead, here’s a coupon for 20% off your next order. Maybe you can come into the store, and we can get to know each other a little better! (Then we’ll see about the chocolate and roses for next year! ;))

Yours truly,

Your friends at Everything Electronics St.

St. Patrick’s Day Lovin’

St. Patrick’s Day might not be the most popular day to write letters to customers, but it might be right for your brand. If so, try one of these St. Patrick’s Day letter ideas:

– St. Patrick’s Day Lovin’
If you missed your chance to tell your customers that you loved them on Valentine’s Day, try telling them on St. Patrick’s Day!

Dear Timothy,

Roses are red, shamrocks are green, you’re the best customer that we’ve ever seen!

Happy St. Patrick’s Day, from all of us at Paddy’s Pub!

With a creative little letter like this, your customers will walk away feeling pleasantly surprised, and appreciated.

– St. Paddy’s Holiday Offer
If your customers celebrate St. Patrick’s Day, then you have a good excuse to celebrate it with them. Make your customers St. Patrick’s Day offers to generate sales and excitement.

Dear Sean,

Happy St. Patrick’s Day! A pot of gold is near, are you feeling lucky? Then come into Blue Royale today, and test your luck on the casino floor! There’ll be plenty of green booze, discount appetizers, and prizes waiting for you.

We hope to see you there! The Blue Royale Team.

P.S. Your first Shamrock Shot is on us!

Happy Halloween

Halloween is another fun and commercial holiday enjoyed by customers of all ages. Whether Halloween is an on-brand occasion for your business, or you want to stir up some sales, here’s an example Halloween letter that you could write your customers:

– Halloween Greetings and Offers
You’ve heard it all – “spooky sales,” “scary deals.” Companies are cashing in on Halloween, and you can write a Halloween letter or email that does the same:

Dear Albert,

Halloween is our time of year, right? It’s like Christmas before Christmas – the time of year when you can eat candy for breakfast, lunch, and dinner, and be anything you want to be.

To help you truly take advantage of this time of year, we’ve got some scary deals going on at our store. Come in and take advantage of our last-minute discounts, and make any final additions to your Halloween party, costume, or home decorations!

We hope to see you around! Sincerely,

The Holidays Plus Team

– Halloween Jokes
Halloween is a holiday that is not short of puns and jokes (albeit, some of them terrible). Here’s how you might use an on-brand Halloween joke in a letter to customers:

Dear Janet,

What do you call a Halloween flower arrangement? A Boo-quet!

Order your Halloween Boo-quet today and receive 25% our fall floral creations!


Eliana’s Flower Shop

– All Candy, All Fun
You don’t have to squeeze sales out of your customers in order to wish them a Happy Halloween. Use the following Halloween card example to send a letter to your customers just because!

Dear Jenna,

We want to wish you a very Happy Halloween! May your night be full of endless candy, without the stomach ache!


Your friends at Ion Enterprises

By being thoughtful and current, you can organically bring your company into your customer’s mind with a similar letter to your customer.

Happy Thanksgiving

Show your customers that you are grateful for them using these examples of Thanksgiving letters to customers:

– Thankful for your Business

Dear Chelsea,

We just wanted to take the time to let you know how thankful we are to have you as our client. Our success over the years has been a direct result of indispensable clients such as yourself. We couldn’t have done it without you. Thank you for sticking with use through thick and thin. We hope you have a wonderful Thanksgiving!

Enjoy your turkey,

Emily Johnston

– Thankful for your Help
Nonprofits and other organizations that accept donations may thank customers for something a little different come Thanksgiving. See how the following Thanksgiving letter to customers applies to non-profit organizations:

Dear Matthew,

This Thanksgiving, we are grateful for the donations that we have collected during our seasonal food drive. Thanks to our donors and the hard work of our volunteers, 100 families in need will be able to have a Thanksgiving meal this coming Thursday.

One step at a time, we can make a difference. Thank you for being a part of this movement to end hunger. Happy Thanksgiving to you and your families.

Sincerely, Hunger Abolition Co.

This letter format can be tweaked to accommodate any nonprofit, for any holiday.

Merry Christmas

Christmas cards are a great way to spread holiday cheer to your customers, even if you don’t have a bag of gifts for them. Use these Christmas letters to customers to show them that even during the busiest time of year, they are still on your mind.

– You Make Each Christmas the Best Christmas
Has a customer been with you through many a Christmas? This may be the Christmas letter for them:

Dear Alexander,

Because of you, every Christmas at Hannah’s Closet is nicer than the last. You help make us a better company. Merry Christmas to you and yours.


Hannah and Co.

– Warm Christmas Wishes
Veer your yuletide hopes away from your company, and into the customer’s home with warm Christmas wishes:

Dear Caiden,

We at Tools Depot wish you a very Merry Christmas! We hope your holidays are as wonderful as you are, and that you find your home full of love, warmth and laughter.



If you were to write a family member a Merry Christmas letter, how would you do it? What can you take from that to give your customers genuine season’s greetings?

Happy Holidays (General)

Chances are, not all of your customers will celebrate Christmas. Use the following example letters to customers to help you write your own all-inclusive holiday wishes.

– B2B Holiday Thanks (and Well-Wishes)

Dear Chase,

Thank you for loyalty and goodwill throughout the past year. We wish you the happiest of holiday seasons, and we look forward to our meetings next year.



– Funny/On-Brand Holiday Wishes

Dear Ingrid,

We hope this holiday season finds you on a remote island, sipping coconut water and taking shots off a hot yoga teacher named José. And if it doesn’t, we hope it at least finds you at home with your family, surrounded by love, happiness, and comfort. Hey, there’s always next year to make those travel plans, right?


Your Friends at Destination: Anywhere

Holiday letters can be serious or lighthearted: what matters is that they celebrate the season – and the customer.

Miscellaneous Holidays and Days of Recognition

Is there a niche holiday that isn’t widely celebrated, but that might be relevant to your brand? Writing a holiday letter for a miscellaneous, less well-known holiday or national day may teach your customers something unexpected, and make your company stand out. After all, how hard do you have to fight for your reader’s attention on International Axe Throwing Day?

Here are some examples of offbeat holidays that your company could write to customers on, should they suit your brand:

  • National Cheese Lover’s Day – January 20th
  • National Pizza Day – February 9th
  • World Sleep Day – March 16th
  • Doctor’s Day – March 30th
  • Bicycle Day – April 19th
  • New Homeowners Day – May 1st
  • Programmer’s Day – September 13th
  • World Kindness Day – November 13th
  • National Cookie Day – December 4th

Are you a company that sells artisanal cheeses? Write to your customers on National Cheese Lover’s Day! Are you a non-profit that works to eliminate bullying from schools? Write to your donors on World Kindness Day. To find a miscellaneous holiday that resonates with your company, do a quick internet search and see what comes up.


Some days may be better (strategically speaking) than others to write to your customers. But in the end, if you write with compassion and demonstrate an investment in your customers, then they will respond positively to the gesture.

Any of these example letters can be modified to fit any brand, any holiday, and any client.

We hope that we have given you some inspiration on how to write the perfect letter to customers, regardless of what day it is.

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