The Mega Must-Have Marketing Calendar: December 2025

December Marketing Must 

December is the month where visibility = revenue. With the summer rush, Christmas gifting and New Year planning all happening at once, this is the perfect time for businesses to tighten up their online presence — starting with SEO. Did you know, 93% of online experiences in Australia begin with a search engine. That means if your website isn’t optimised, customers will find someone else first. December is your chance to clean up your SEO foundations before 2026 kicks off strong.  

Maybe start simple: check your metadata, your links, and the clarity of your content. These are the little fixes that deliver big results — especially when customers are searching more, browsing longer, and comparing everything before they buy. Already optimised? Go bigger. Create a summer-ready or holiday-themed gift guide that features your products or services (and even local partners). Then lock in your operating hours everywhere online — Google Business Profile, social platforms, your website, and any booking pages. 

December is also the perfect month to finalise your 2026 marketing plan — what worked, what didn’t, and where you want your brand to show up next year. 

December Promo Ideas

• Refresh your metadata to capture holiday and summer search demand. 

• Run a DIY “holiday audit” on your website — broken links, outdated pages, unclear messaging. 

• Launch your Summer Gift Guide featuring your products + local business partnerships. 

• Update your holiday trading hours everywhere customers look. 

• Encourage reviews and UGC while customers are already engaged. 

• Share your “2025 Wins & 2026 Vision” content to build trust and momentum. 

Subject Line Ideas 

• Warm recipes from our family to yours 🥧 

• What to Avoid This Summer 

• It’s Summer Savings! 

• Sleigh Your Christmas with These Ideas 

• Cheers to You,  Get a New Year’s Dealer 

Key Dates for Your December Social Calendar 

📅 Dec 1 — First Day of Summer 

Highlight seasonal services or products. Promote summer-specific offers, bundles, or deals.
Hashtags: #FirstDayOfSummer #AussieSummer #SmallBizAU 

📅 Dec 25 — Christmas Day 

Share a warm, simple greeting + your operating hours.
Hashtags: #MerryChristmas #LocaliQANZ 

📅 Dec 31 — New Year’s Eve 

Share resolutions, gratitude content, or “Year in Review” highlights.
Hashtags: #NYE2025 #NewYearNewGoals 

(Download your guide here)

December is all about visibility, clarity  and connection. From SEO clean-ups to holiday gift guides and seasonal engagement posts, this month sets the tone for how strong you start 2026.