December 2025 social media calendar
Hi, I’m Layla, content producer here at Dotdigital and your go to for planning your social media calendar. As we close out the year, December is all about celebration, connection, and creative flair. With festive campaigns in full swing and audiences soaking up the holiday spirit, now’s the time to make your content shine. And speaking of magic, Wicked hit cinemas at the end of November, and its soundtrack and enchanting visuals are taking over social feeds. Don’t miss the chance to tap into that momentum, think:
- Trending audios
- Cinematic clips
- A touch of emerald sparkle to bring your December content to life
Here are your highlights, key themes and observances to help you plan your December social media calendar. It’s packed with ideas to spark inspiration for both your social posts and email marketing campaigns.
Important social media calendar dates in December
December 1 – World AIDS day #WAD2025
December 1 – Cyber Monday #CyberMonday
December 2 – Giving Tuesday #GivingTuesday
December 3 – Make a gift day #MakeAGiftDay
December 3 – International day of persons with disabilities #IDPwD
December 4 – Cookie day #CookieDay
December 5 – International ninja day #DayOfTheNinja
December 5 – World soil day #WorldSoilDay
December 6 – Saint Nicholas day #SaintNicholasDay
December 7 – Cotton candy day #CottonCandyDay
December 8 – National brownie day #NationalBrownieDay
December 8 – Pretend to be a time traveler day #PretendToBeATimeTravelerDay
December 9 – Christmas card day #ChristmasCardDay
December 10 – Human rights day #HumanRightsDay
December 11 – International mountain day #InternationalMountainDay
December 13 – Gingerbread house day #GingerbreadHouseDay
December 14 – Monkey day #MonkeyDay
December 14 – Hanukkah starts #HappyHanukkah
December 15 – 10 days to Christmas #10DaysToGo
December 17 – National maple syrup day #NationalMapleSyrupDay
December 18 – Bake cookies day #BakeCookiesDay
December 19 – Ugly Christmas sweater day #UglyChristmasSweaterDay
December 21 – Crossword puzzle day #CrosswordPuzzleDay
December 21 – First day of winter #WinterSolstice
December 22 – Hanukkah ends #Hanukkah2025
December 24 – Christmas eve #ChristmasEve
December 25 – Christmas day #MerryChristmas
December 31 – New year’s eve #NYE2025
Themes for the month
Hanukkah: December 14, 2025 – December 22, 2025
Christmas: December 24, 2025 – December 26, 2025
Kwanzaa: December 26, 2025 – January 1, 2025 #NguzoSaba
December 1 – Cyber Monday
Getting your December social media calendar started with Cyber Monday which marks one of the biggest online shopping events of the year, when digital deals dominate timelines and inboxes. It’s the perfect opportunity for brands to close out the Black Friday weekend with a final push that drives conversions and captures last-minute attention. Lean into urgency and exclusivity, use countdowns, “last chance” messaging, and time-sensitive offers to encourage fast action. Incorporate shoppable links in Stories and posts, and don’t forget your email campaigns: short subject lines, dynamic content blocks, and clear CTAs perform best during this rush.
Image source: Mail Charts
December 4 – Cookie day
Cookie day is the perfect moment to bring some sweetness to your December content strategy. Food and beverage brands can share mouth-watering recipes, limited edition flavors, or behind-the-scenes baking content, while lifestyle and retail brands can join in with cookie-inspired visuals, cozy product pairings, or playful challenges. Fashion brands can even tap into the rising foodcore trend, pairing textures and tones that mimic freshly baked treats or staging cookie-themed shoots that blur the line between food and fashion. Think warm, golden imagery, soft lighting, and captions that invite followers to indulge.
Image source: Instagram
December 7 – Cotton candy day
Cotton candy day is your chance to add a pop of pastel colour to your December feed. Food and beverage brands can share creative spins on cotton candy flavors or dreamy dessert visuals, while fashion and lifestyle brands can lean into soft, sugary tones. Think candy-colored styling, fluffy textures, or product flat lays that look good enough to eat. Beauty brands can join in by launching limited-edition cotton candy collections, pastel packaging, or iridescent looks inspired by the treat.
Image source: Instagram
December 8 – National brownie day
Who can resist a warm, fudgy brownie moment? Brownie Day is the perfect reason to slow things down and celebrate indulgence. From behind-the-scenes baking reels to close-up dessert shots, food brands can turn texture into storytelling. Lifestyle and beauty brands can take a mood-driven approach, think chocolate-toned palettes, cozy textures, and campaign copy that taps into that feel-good, “treat yourself” mindset audiences love this time of year.
Image source: Mail Charts
December 9 – Christmas card day
Christmas Card Day is a gentle reminder that a personal touch never goes out of style. In a world of quick DMs and inbox offers, this day invites brands to slow down and reconnect. Share handwritten notes from your team, spotlight customer appreciation, or design digital cards that spread festive cheer across your socials and email campaigns.
Image source: Mail Charts
December 15 – 10 days to Christmas
10 Days to Christmasthe countdown is on, and it’s time to sprinkle a little last-minute magic across your campaigns! Brands can spotlight gift guides, holiday bundles, or limited-time offers to help followers check off their wishlist’s. Fashion, beauty, and lifestyle brands can highlight curated seasonal collections, while food and beverage brands can tempt audiences with festive recipes and treats. On social, fun countdown posts, unboxing reels, and shareable “holiday hacks” work best, it’s all about creating excitement, urgency, and that irresistible “grab it before it’s gone” vibe.
Image source: Mail Charts
December 17 – National maple syrup day
National Maple Syrup Day pour a little golden magic into your content! This is the perfect moment to get creative with storytelling: share your favorite cozy morning rituals, highlight seasonal pairings, or show how your products can be part of indulgent holiday traditions. Food brands might run quick recipe reels or “maple twist” hacks, while lifestyle and fashion brands could lean into playful flat lays, textures, or even maple-inspired color pops in their collections. On social, consider interactive polls (“pancakes or waffles?”) or quick “how-to” videos. It’s all about creating content that feels cozy, engaging, and a little unexpectedly delightful.
Image source: Mail Charts
December 19 – Ugly Christmas sweater day
Ugly Christmas Sweater Dayit’s your official pass to get a little ridiculous. Brands can lean into humor and personality, whether that’s showcasing holiday collections with playful patterns, running user-generated content challenges (“show us your worst sweater”) or pairing products with sweater-inspired visuals. Fashion and lifestyle brands can spotlight themed outfits, while food and beverage brands might create cozy, sweater-matching treats or mugs. On social, short reels, polls, and shareable graphics work best the key is to embrace the silliness and make your audience smile while keeping your brand front and center.
Image source: Mail Charts
December subject line ideas
December marks the grand finale of the year, a month made for celebration, reflection, and connection. With audiences embracing the holiday spirit, it’s the perfect moment to infuse your campaigns with warmth, creativity, and purpose. To help you close out the year strong, we’ve gathered fresh ideas inspired by some of December’s festive moments.
December inspired subject line ideas
Here are some December-themed subject line ideas to inspire your campaigns:
Cyber Monday – Cyber Monday steals that won’t wait – open now
Cookie day – Just baked: the treats everyone’s talking about🍪
Cotton candy day – Spin into sweetness with our latest drop🍭
National brownie day – Indulge your sweet side with a slide of happiness🤎
Christmas card day – Don’t ghost this Christmas… send a card instead
Ginger bread house day – Deck the Halls (and Walls) With Gingerbread Fun
10 days to Christmas – Tick-tock, unwrap these before it’s too late!
National maple syrup day – Your stack called – it wants more syrup🍁
Ugly Christmas sweater day – Warning: these sweaters may cause excessive cheer
Christmas day – Santa came early – Merry Christmas from us 🎄
New years eve – Final hours to shine – shop before the clock strikes 12!
These subject line ideas are just the beginning, they truly shine when you tailor them to your brand’s unique voice. Add your signature flair with personality, emojis, playful language, or a hint of urgency to make your subject lines pop and grab attention.
For an extra layer of inspiration, try tapping into AI-powered tools like Dotdigital’s WinstonAI, perfect for sparking fresh ideas, tweaking tone, or fine-tuning subject line length.
Spark engagement with your December marketing campaigns
December is the perfect month to fill your social feeds with festive energy and end of year sparkle. From joyful holiday moments to New Year countdowns, there’s endless inspiration to keep your audience engaged. Use this time to share messages of gratitude, showcase your brand’s personality, and create content that celebrates togetherness.
CTA
Learn how to future-proof your marketing strategy with insights from Dotdigital’s latest Hitting the Mark report.
Discover how to build lasting customer loyalty with data-driven insights. The Dotdigital Loyalty Report reveals the strategies and trends that will keep your brand ahead in today’s competitive landscape.
