May newsletter ideas to engage your subscribers (+ tips & examples)

As May approaches and spring is in full bloom, it can become harder to catch your audience’s attention. Fortunately, many occasions are packed into these upcoming 31 days, which creates numerous opportunities for effective email marketing.

In this article, we’ll explore a range of May newsletter ideas and real-life examples from brands, along with a list of engaging subject lines you can use.

May 2026 email marketing calendar

Single-day events

Week-long events

Month-long occasions 

May newsletter ideas for month-long occasions

Month-long events provide numerous benefits for marketers. You can use these as a theme for all your May newsletters and engage your audience throughout the month.

Here are several occasions you can leverage for your May newsletters.

Clean Air Month

The purpose of deeming May the Clean Air Month is to raise awareness about air quality issues. It serves as a reminder of the importance of clean air for public health and the environment.

Consider May newsletter ideas that share tips and promote eco-friendly practices to help improve air quality.

Mental Health Awareness Month

Initiated by Mental Health America in 1949, this occasion has become more critical than ever today. It aims to raise mental health awareness, reduce stigma, and promote well-being.

Any brand can use “mental health” as a theme in its May newsletters, not just those in wellness, mental health, or community support sectors. You can offer resources, tips, or stories to raise awareness and provide assistance.

National Photography Month

Photography serves as a form of expression for both artists and brands. 

Throughout May, photographers share techniques and inspire others to embrace the medium. Brands can use this occasion to run photography contests that produce user-generated content for them.

National Bike Month

Throughout the month, biking lovers and organizations conduct events promoting the benefits of this sport. These events could include community bike rides, safety workshops, and advocacy campaigns.

Other brands can also get involved with some creative thinking. For example, an apparel brand could promote its clothing line for bikers.

National Barbecue Month

May coincides with the arrival of warmer weather and longer days — a perfect setting for outdoor activities, such as barbecues.

Brands can leverage this by offering special promotions on barbecue-related products or sharing barbecue recipes in their newsletter.

Asian American and Pacific Islander (AAPI) Heritage Month

May is AAPI Heritage Month in the USA. Spotlighting AAPI-owned makers or partners, sharing community stories, or donating a portion of May sales to an AAPI advocacy organization is something most USA brands can do. 

Even a brief acknowledgment signals cultural awareness — valuable for brands with diverse audiences.

Most popular occasions in May

• May 1 — International Workers’ Day
• May 2 — World Tuna Day
• May 4 — Star Wars Day
• May 5 — Cinco de Mayo / National Teacher Appreciation Day
• May 6 — National Beverage Day
• May 7 — National Tourism Day
• May 8 — World Red Cross and Red Crescent Day
• May 9 — National Lost Sock Memorial Day
• May 10 — Mother’s Day (USA, Canada, Australia)
• May 13 — World Cocktail Day
• May 15 — National Pizza Party Day
• May 16 — National Love a Tree Day
• May 17 — World Baking Day
• May 18 — International Museum Day
• May 20 — National Rescue Dog Day
• May 22 — National Buy a Musical Instrument Day
• May 23 — World Turtle Day
• May 25 — National Wine Day
• May 25 — Memorial Day (USA)
• May 28 — National Hamburger Day
• May 29 — National Learn About Composting Day
• May 31 — World No Tobacco Day

May newsletter ideas

1. Star Wars Day (May 4)

In the 1977 Star Wars movie, the iconic phrase “May the force be with you” was introduced — and May 4th has been a fan celebration ever since. Even brands with no sci-fi connection can tap into the cultural moment with the right framing.

Newsletter ideas:

• Run a one-day “May the Fourth” flash sale or bundle drop
• Let your audience “choose their side” with a product quiz or split campaign
• Spotlight items that are “rebellious” vs. “classic” — the theme does the heavy lifting

LEGO celebrates Star Wars Day with a special event from May 1st to May 4th, promoted across its email campaigns. They feature exclusive Star Wars-themed products, such as helmets and fighter pilot sets, turning a cultural moment into a product-launch window.

2. Cinco de Mayo (May 5)

Cinco de Mayo commemorates the Mexican victory over the French Empire in 1862. Primarily celebrated in Mexico, it’s also prominent in the Mexican communities of the USA. The day is marked with parades, music, traditional dances, and feasts.

Newsletter ideas:

• Create limited-edition products inspired by Cinco de Mayo. Alternatively, offer special promotions or discounts on Mexican-inspired items.
• Incorporate vibrant colors like red, green, and yellow, reminiscent of the Mexican flag. You can also use visual elements featuring traditional Mexican motifs. Examples include sombreros, maracas, chili peppers, and cacti.

Be careful to stay tasteful when designing your newsletter and copy. It’s all too easy to overd

Threads 4 Thought participates in Cinco de Mayo celebrations, despite not offering directly related products. In such cases, a simple message wishing subscribers well is enough, as shown in the example.

3. National Tourism Day (May 7) 

Everyone loves travel — both the act of going somewhere new and the industry that makes it all possible. For many brands, that’s the perfect opportunity to connect with customers in various ways and in different segments. Your emails can reach camping lovers, trip planners, or regular tourists. 

Even if you’re not selling luggage or hotel stays, anything that travels with someone, such as clothing, food, electronics, and accessories, has a tourism angle worth exploring.

Newsletter ideas:

• Feature customer travel stories or photos with your products in real destinations.
• Curate a “what do I pack” gift or travel guide built around the upcoming season
• Share a behind-the-scenes look at how your products are made or sourced

FLEXTAIL, a Hong Kong-based outdoor gear brand and beloved Omnisend customer, took the customer-reviews approach with their “MAX PUMP 3 Camping Reviews” email. They didn’t spend on product specs or discounts – only on reviews from creators and customers. The entire email is drafted to sound helpful rather than salesy. 

All of these features work in tandem, as travel and camping are all personal experiences, so UGC-driven sends work great.

4. Mother’s Day (May 10)

Mother’s Day is the perfect time to honor the love and sacrifices of mothers worldwide and express gratitude to these extraordinary women. And people do — Mother’s Day is one of the highest spending holidays of the year. 

It’s also one of the most competitive inbox moments of the year, which means timing and relevance matter more than volume.

Newsletter ideas:

• Send a curated gift guide 2–3 weeks before May 10, segmented by recipient type (“for the new mom,” “for the grandma”) or budget (“gifts under $50”)
• Follow up with a delivery deadline reminder 4–5 days before the holiday — these emails convert exceptionally well.
• For last-minute shoppers, a digital gift card or instant-delivery email on May 9–10 captures buyers who’ve run out of time. Add in some easy gifts as well – your recipients likely don’t have too much time to think.

Rachel Riley offers subscribers exclusive early access to their Mother’s Day collection, along with a 25% discount, using soft lavender tones and a family lifestyle image that reinforces the occasion without overexplaining it. 

The email cross-promotes their Easter Look Book below the fold — extending the campaign’s commercial value beyond a single event. It’s a rare example of when combining two distinct campaigns in one newsletter works well.

5. Memorial Day (May 26)

Memorial Day is a federal holiday in the USA that honors those who died in military service. As a cultural moment, it also marks the unofficial start of summer — and that dual meaning gives brands a clear commercial angle without needing to be irreverent about the observance.

Newsletter ideas:

• Lead with summer: frame Memorial Day as the starting gun for warm-weather shopping rather than centering the promotion on the holiday itself
• Run a long-weekend sitewide sale with a clear end date — “ends tonight” subject lines perform strongly on Memorial Day Monday
• Segment by category: apparel, outdoor, travel, and home all have natural summer-launch angles

Timberland’s Memorial Day email leads with “Last Chance — Ends Tonight” and 25% off sitewide, then breaks the offer into four category sections (Men’s, Women’s, Workwear, Kids’) before closing with a summer product grid. 

Sending it on the final day of the sale — when urgency is at its peak — is deliberate: Memorial Day Monday consistently drives the highest conversion rate of the long weekend.

6. Mental Health Awareness Month

Mental Health Awareness Month is intended to educate people on mental health issues and reduce the social stigma associated with these conditions. May newsletter ideas revolving around the occasion should be sensitive, informative, and careful, but can be used nearly universally – almost everyone grapples with mental health challenges at some point.

Newsletter idea:

• Feature testimonials or interviews with mental health advocates, survivors, or professionals.
• Showcase products or services that promote relaxation, mindfulness, and self-care. Examples include meditation apps, wellness subscriptions, and aromatherapy products.

Keeps, a men’s hair care and hair loss prevention brand, adopts a unique approach for Mental Health Awareness Month – spreading awareness to a mostly male audience for which addressing mental health concerns remains a sensitive subject.

The brand understands this and urges men to seek treatment for their struggles while also providing expert advice from professionals.

7. National Bike Month

A more environmentally conscious occasion, National Bike Month encourages leaving the car behind and opting for a bike ride instead. It’s enjoyable, promotes good health, and benefits the environment.

Newsletter ideas:

• Organize a community bike ride or event to celebrate National Bike Month. Encourage subscribers to join and promote the event through your newsletter.
• Highlight success stories or testimonials from cyclists in your community. Inspire non-cyclists to join the bandwagon by showcasing the benefits of biking.

Peloton, a well-known fitness brand, is a good inspiration for your own May newsletter ideas. The brand leverages National Bike Month to engage with its customers. Their email guides readers to the brand’s bike product page and inspires them to explore various options and discover workouts that suit them.

Ideas for May newsletter subject lines

You don’t have to write subject lines all by yourself or even copy existing ones. Use Omnisend’s free AI subject line generator. All you need to do is enter a few keywords to get a list of options. Or if you have something in mind, but are not sure — our email subject line tester is here to help.

Mother’s Day subject lines

• For the mom who says she doesn’t want anything
• The women who raised USA deserve more than a card
• The edit: gifts moms actually want this year
• Skip the candle. We’ve got better ideas.
• 20% off everything Mom would actually want
• The “I actually love this” gift guide
• Order by May 7 — and she’ll have it by Sunday
• Mother’s Day sale: our best gifts, our best prices
• 12 gifts that aren’t another mug
• What to get the mom who has everything
• Better than flowers (we promise)
• Mom called. She wants this one.
• The gift she’ll text her friends about
• Last call: Mother’s Day delivery ends tonight
• Sunday’s coming. Is your gift ready?

Memorial Day subject lines

• Remembering our heroes: Memorial Day savings await
• Honoring those who served: Memorial Day discounts inside
• Last call: Memorial Day sale ends tonight
• This Memorial Day, we remember
• Memorial Day weekend: 25% off sitewide
• Long weekend, longer savings
• Summer starts Monday — shop the long weekend sale
• The unofficial start of summer is here

Star Wars Day subject lines

• May the fourth be with you: Star Wars Day deals inside!
• Star Wars fans rejoice! Exclusive offers await you
• May 4th only: these deals won’t last at lightspeed
• 24 hours, one galaxy, one sale
• A long time ago, in a galaxy far, far away… there were better deals
• Happy Star Wars Day — may your cart be with you
• Choose your side — and your discount
• May the 4th savings: 20% off sitewide today
• The force is strong with these savings

Cinco de Mayo subject lines

• Fiesta time! Cinco de Mayo savings inside!
• Spice up your Cinco de Mayo celebration with these deals!
• Cinco de Mayo only: today’s deals end at midnight
• One day, one sale — Cinco de Mayo savings
• Celebrating Mexican heritage this Cinco de Mayo
• It’s a fiesta in your inbox
• Tacos, tequila, and 20% off
• Feliz Cinco de Mayo — shop the celebration
• Cinco de Mayo: 15% off sitewide today

Mental Health Awareness Month subject lines

• You’re not alone: supporting mental health awareness
• Mind matters: mental health tips that really work
• Take five. Your May wellness guide is here.
• It’s okay not to be okay — resources inside
• Small habits, big difference: a mental health guide for May
• This May, we’re talking about something important

General May subject lines

• Pedal into savings: National Bike Month deals await!
• New month, new offers: what’s in store for May
• Fresh for May: new arrivals just dropped
• Last week of May — final chance for monthly offers
• May the fourth be with you — and so will these deals
• Spring into savings — May deals are here
• May is here — and so are the best deals of the month
• Your May shopping schedule starts here

Wrap up

There are plenty of occasions in May, so consider which one fits your brand best and resonates with your audience the most.

Additionally, remember to always craft compelling subject lines and segment your audience for personalized communication. And to save time, Omnisend has pre-made May newsletter templates in its gallery.