Summer clothing disappears from shops while it is still warm, and winter coats vanish during the coldest weeks. The retail calendar runs on a schedule set long beforehand.
The calendar was fixed years earlier
Ranges are selected at trade shows and supplier meetings far ahead, with fabric committed, production booked and delivery dates agreed before a single garment is made.
Those delivery dates are contractual, so stock arrives when it arrives, and the shop floor has to accommodate it whatever the temperature outside happens to be.
Each delivery displaces the one before it, which creates a rolling sequence that cannot pause without the following deliveries backing up behind it.
Full-price selling has to come first
A range earns most of its margin before any reduction is applied, so the full-price period is placed as early in the season as the stock allows.
By the time the weather makes a garment obviously useful, that range has already been selling for weeks and is entering its markdown phase.
Reductions therefore begin while demand is still rising, which looks strange from the shop floor and is entirely rational from the buying office.
Why replenishment is limited
Reordering a seasonal line means committing to production that may arrive after demand has passed, which is the outcome buyers most want to avoid.
Fabric availability is the practical constraint, since mills produce to order and a repeat run requires material that may no longer exist in that colour.
Ranges are therefore bought once, in a quantity decided months earlier, and what sells out is generally gone for that season entirely.
The effect on sizes and choice
The best selection exists before the season is under way, and the middle of the size curve disappears first at every price point.
Late shoppers choose from what did not sell, which skews towards the extremes of the size range and towards colours that were less popular.
This is why waiting for reductions trades price against fit, and why the trade is steepest in categories where fit is least forgiving.
Where the model is changing
Retailers producing in shorter cycles respond to demand within weeks rather than seasons, which weakens the traditional two-season structure considerably.
Shorter cycles bring their own consequences in waste and in production conditions, and they depend on manufacturing located close to the selling market.
The long-lead model persists where fabric, tailoring and quality control require time, which is why higher-priced clothing still follows the older calendar.