Why do two fashion stores with similar products and budgets end the year with such different results? A large part of the answer lies in when each decided to advertise . In fashion retail, seasonality and media planning go hand in hand: the demand for clothing changes with the weather, commercial dates, and the pace of collections. Those who maintain a fixed advertising investment (the same in January and November) usually pay more to sell less.
And the sector is not small. According to NuvemCommerce , a survey by Nuvemshop , fashion sales in Brazilian e-commerce grew 35% in 2025 (with expectations of even higher growth in 2026). With this level of competition, getting the media timing wrong is costly.
On this page you will find:
Seasonal media planning: what determines the outcome
Before looking at the calendar in detail, here are the points that matter most in practice:
- Demand in the fashion industry is predictable: Weather and commercial dates create peaks that repeat every year, allowing for media planning months in advance;
- The cost of advertising increases during peak periods: On dates like Black Friday, the ad auction becomes more competitive and the CPM increases, so lead generation needs to start earlier;
- Collection and media come together: Launching the winter collection without sufficient acquisition funds at the right time hinders inventory turnover;
- Building an audience early reduces costs: Building audiences and remarketing lists outside of peak periods makes conversion cheaper when the date arrives;
- Each channel has its own timing: Google and Meta respond at different paces, and the plan defines how much to invest in each and when.
The fashion retail calendar: weather, collections and dates
Two forces organize the year in fashion. The first is the weather , which dictates the change of collections (autumn-winter and spring-summer) and anticipates the demand for specific pieces as soon as the temperature changes. The second is commercial dates , which concentrate purchasing intentions in short windows.
In Brazil , this calendar is well-defined: back to school at the beginning of the year, Mother's Day in May, Valentine's Day in June, Father's Day in August, Children's Day in October, and at the end of the year, the sequence of Black Friday and Christmas. In between, end-of-season sales move stagnant inventory.
The point that many overlook is the lead time . Purchase intent appears in searches weeks before the date. If the media only enters the market on the day itself, the brand is competing for space when costs are already at their peak and loses out to those who started warming up the audience beforehand.
A quick read of the year
| Period | When planning media | Campaign focus |
|---|---|---|
| Summer and back to school (Jan–Feb) | November–December | Collection launch, summer sale. |
| Autumn-winter (March–June) | February–March | New collection, seasonal pieces |
| Mother's Day and Valentine's Day (May–June) | 4 to 6 weeks before | Gifts, remarketing, kits |
| Spring-summer and end of year (Oct–Dec) | September–October | Children's Day, Black Friday, Christmas |
Seasonality and media planning: how to put together a plan.
A good plan starts with historical data. Comparing the performance of each period with the same month of the previous year shows where demand is truly concentrated and how much return each date generated. This data guides the distribution of funds throughout the year, instead of dividing the budget into equal parts.
With the calendar defined, the budget is divided into two layers. One part sustains the presence throughout the year , keeps the brand visible, and feeds the remarketing lists . The other is reinforced in the weeks leading up to each peak , when the objective shifts from building an audience to converting.
The choice of channel follows the same logic. Google captures the demand of those already searching for a product, which is useful when intent is high, close to the date. Meta's social media helps to spark desire and re-engage those who visited the store , a task that yields better results when done in advance. Distributing the budget between the two, respecting the timing of each, is what sustains the outcome.
It's worth tracking performance using metrics that show efficiency, not just volume: ROAS per campaign, CPM over the period, CAC per channel, and conversion rate on each date. These numbers indicate when to scale investment and when to hold back.
The growth outlook reinforces the urgency of planning. Statista projects that fashion e-commerce in Brazil will experience an average growth of 11,56% per year until 2029. More revenue in the sector means more competition in advertising auctions and more value in getting there before competitors.
To organize the year in more detail, it's also worth reviewing the article on the e-commerce business calendar on the e-Plus blog.
Turn the calendar into results.
Understanding seasonality is the first step; transforming it into a media plan that invests at the right time is what separates those who grow from those who merely follow the market. If your fashion brand wants to align budget, collection, and dates throughout the year, talk to the e-Plus media management team and take the opportunity to explore other content about e-commerce and performance here on the blog.
FAQ – Seasonality and media planning
What is seasonality in fashion retail?
Seasonality in fashion retail refers to the predictable variation in demand throughout the year, driven by weather and commercial dates. Demand changes according to the season and events such as Mother's Day, Black Friday, and Christmas, allowing for advance planning of inventory and media.
How does the industry calendar influence media planning?
The calendar indicates when purchase intent rises, allowing you to concentrate your advertising budget in the weeks leading up to each peak. Advertising in advance reduces costs, as CPM increases during periods of higher competition, such as Black Friday.
How far in advance should I plan campaigns for commercial dates?
Ideally, you should start building your audience four to six weeks before the date. This allows you to build an audience and remarketing lists before the cost peak, making the conversion phase cheaper and more efficient when demand reaches its peak.
What metrics should you track in seasonal fashion campaigns?
The most useful metrics are ROAS per campaign, CPM over the period, CAC per channel, and conversion rate on each date. Together, they show the efficiency of the investment and indicate the right time to scale up or down the media budget.
