Amazon Seller Calendar 2026: Key Dates and Inventory Planning Guide

Sellers who run out of stock during Prime Day or Black Friday don't lose a few sales. They lose ranking, ad spend, and months of momentum. The dates that matter aren't just the shopping holidays themselves. What matters is when you place the PO, when you ship to FBA, and when you start promoting.

This is the Amazon seller calendar for 2026. It covers retail holidays, Amazon-native events, and the planning windows that determine whether your inventory arrives on time or sits in receiving while your competitors take the buy box.

How to Use This Amazon FBA Calendar

Work backward from demand, not from the holiday itself

Most sellers look at a calendar and see February 14. Operators see the supply chain that has to finish before February 14.

If you're importing goods, Chinese New Year can shut down factories for two weeks in mid-February. That means Valentine's inventory needs to be ordered in Q4 of the prior year, not in January when the holiday is visible.

If you're replenishing fast-moving stock, you need to know your supplier lead time, freight transit time, Amazon receiving time, and how long it takes your listing to regain velocity after a stockout. A seven-day event doesn't start seven days before the event. It starts when you place the order.

Plan inventory, promos, and ad budgets on different timelines

Inventory moves on the slowest clock. Ads move on the fastest.

You can launch a Sponsored Products campaign the morning of Prime Day. You cannot send inventory the morning of Prime Day and expect it to be live in time.

Amazon's own FBA holiday guidance recommends:

• 10 to 12 weeks before the event: Choose products and plan assortment
• 7 to 9 weeks before the event: Order and ship inventory to FBA
• 4 to 6 weeks before the event: Refine listings, images, A+ content
• 3 weeks before the event: Launch promos, deals, and ad campaigns

That's the planning cadence that works. Ignoring it is how sellers end up with great ad performance and no inventory to fulfill the orders.

Why late inventory hurts more than just sales

In 2021, a stockout meant lost sales. In 2026, it can also mean:

• Low-inventory-level fees. Amazon charges a fee when your days of supply drop below a threshold. Running lean to save storage costs can backfire.
• Inbound placement fees. Sending inventory late sometimes means paying for split shipments or accepting higher placement costs to get stock distributed faster.
• Ranking and ad relevance loss. When you go out of stock, your organic rank drops and your ad campaigns lose their conversion history. You don't just lose the sales during the stockout. You lose momentum after you restock.
• Promotions you can't run. If you planned a Lightning Deal or Best Deal for Prime Day and your inventory arrives late, you miss the event entirely. Amazon doesn't let you reschedule.

The calendar matters because the penalties for missing it got worse.

Q1 2026 Key Dates for Amazon Sellers

January events and planning priorities

January is when sellers reset inventory after Q4, close out aged stock, and start planning for spring. It's also when you finalize Chinese New Year contingency plans if you source overseas.

For replenishable items, this is the window to restock anything that sold down during Black Friday and holiday season before spring demand picks up.

Valentine's Day and early Q1 send-in timing

Categories with Valentine's exposure (jewelry, beauty, home, gifting) need inventory live by late January. If you're importing, that means POs placed in Q4 of 2025.

Plan promos and ad budget increases starting February 1. Amazon search volume for Valentine's keywords peaks in the week before the holiday, but conversion-focused shoppers show up earlier.

Chinese New Year supply chain considerations

Chinese New Year shuts down manufacturing for roughly two weeks, with some factories extending closures or running at reduced capacity into early March. If your supply chain touches China, this affects:

• Spring inventory (Easter, Mother's Day, Memorial Day)
• Early Q2 replenishment cycles
• Any new product launches planned for March or April

Sellers who wait until after CNY to place spring orders often find themselves short in May. The operators who plan around this place POs in December or early January.

Q2 2026 Key Dates for Amazon Sellers

Easter, Mother's Day, Memorial Day, and Father's Day

Q2 is heavier than many sellers expect. Giftable categories, outdoor and patio, lawn and garden, beauty, apparel, and home goods all see demand spikes across these events.

Mother's Day alone drove over $34 billion in consumer spending in 2025 (per NRF). Father's Day hit a record $24 billion. Those are not minor events.

For Mother's Day inventory, plan to have stock live by late April. For Father's Day, target early June. Easter timing depends on category, but anything gift- or candy-adjacent should be live by mid-March.

Spring sale and deal-planning opportunities

Amazon ran Big Spring Sale in late March 2025 (March 25-31). It's becoming a real tentpole event, not just a low-effort sale placeholder.

If Amazon repeats the event in 2026, treat it like a smaller version of Prime Day:

• Plan inventory and deal submissions at least 6 weeks out
• Launch new spring products or test new listings before Q2 demand hits
• Use it as a velocity and conversion signal before Prime Day planning

When to start Prime Day inventory planning

Prime Day 2025 ran July 8-11 and became Amazon's biggest Prime Day event yet. Assume 2026 will follow a similar mid-July window unless Amazon announces otherwise.

Prime Day inventory planning starts in April, not June.

By early May, you should:

• Know which ASINs you're promoting
• Have POs placed or inbound shipments scheduled
• Start submitting Lightning Deals and Best Deals if you're running them

By late May / early June:

• Inventory should be checked in at FBA and live
• Listings should be optimized (images, A+ content, bullets, backend keywords)
• Ad campaigns should be built and ready to scale

Prime Day is not a two-day event. It's a multi-week planning cycle that starts months before the actual sale.

Q3 2026 Key Dates for Amazon Sellers

Prime Day preparation window

See Q2 notes above for planning windows. Once the event is live, your job shifts to real-time monitoring:

• Watch inventory velocity and reorder if stock is moving faster than forecast
• Adjust bids and budgets on ad campaigns based on ACOS and conversion
• Monitor buy box share if you're in a competitive listing
• Track sellthrough rate to avoid post-event overstock

The week after Prime Day is when operators evaluate what worked, what didn't, and what that means for Q4 planning.

Back-to-school planning

Back to school matters for categories beyond just school supplies: electronics, apparel, home organization, snacks, personal care, and anything college-aged students buy when setting up dorms.

Inventory should be live by late July. Promotions and increased ad spend should start in early August.

Labor Day marks the end of summer seasonality for outdoor, patio, and lawn categories. If you're in those spaces, this is your last major sell-through window before fall and holiday inventory takes over warehouse priority.

Late-summer inventory and forecasting checkpoints

Late August and early September is the last window to adjust Q4 inventory forecasts before you're locked into your Black Friday and holiday plans.

Review:

• How Prime Day performed vs. forecast
• Whether your back-to-school velocity is trending high or low
• Your current days of supply and whether you're at risk of low-inventory fees
• Supplier lead times and whether you need to pull forward any Q4 POs

Sellers who wait until October to finalize Q4 inventory often find themselves short or paying for expedited freight.

Q4 2026 Key Dates for Amazon Sellers

Prime Big Deal Days

Amazon ran Prime Big Deal Days October 7-8 in 2025. It's now a confirmed annual event, functioning as the Q4 kickoff and an early holiday shopping window.

Retailers have moved holiday hiring and promotions into October (per NRF), and Amazon's October Prime event is part of that shift. Consumers are shopping for holiday gifts in early October, not just waiting until November.

Inventory for Prime Big Deal Days should be live by mid-September. Deals and promotions should be submitted by late August or early September.

For holiday-heavy brands, this event doubles as a demand test. If a product performs well in early October, you know to push more inventory for Black Friday and Cyber Monday.

Black Friday and Cyber Monday

Black Friday and Cyber Monday are no longer isolated days. Amazon promotes deals throughout Thanksgiving week, and shopping behavior now spreads from mid-November through early December.

Inventory should be checked in by late October. Earlier is better.

Plan promos and deal submissions by mid-October. If you're running Lightning Deals or participating in Black Friday Deals, those windows fill up fast.

Ad budgets should increase starting November 1 and peak during Thanksgiving week.

Holiday cutoff planning and late-season risk management

Amazon publishes final FBA receiving cutoff dates for holiday delivery in Seller Central, usually in October. Those dates vary by fulfillment center, shipment type (parcel vs. LTL), and product category.

General guidance:

• Standard parcel shipments should arrive at FBA by early December for Christmas delivery
• LTL shipments can take longer to receive, so plan earlier
• Anything shipped after mid-December risks missing Christmas entirely

The risk in late December isn't just missing Christmas sales. It's holding inventory into January when demand drops and storage fees reset.

Sellers who overstock in Q4 and don't sell through by December 31 often face:

• Higher storage fees starting January 1
• Aged inventory surcharges if stock sits too long
• Reduced sell-through velocity in Q1 when holiday demand ends

Late-season inventory planning is about balancing stockout risk against overstock cost.

Suggested Inventory Planning Windows by Event

This table shows general planning windows. Your actual lead times depend on supplier location, shipment mode, and current FBA receiving speeds.

Planning notes: PO placement assumes overseas manufacturing with 60-90 day lead times. Domestic suppliers move faster. Ship to FBA timing assumes parcel shipments. LTL takes longer. These are planning windows, not guarantees. Validate your specific receiving times in Seller Central. When Amazon event dates are still TBD, use historical timing and adjust once dates are confirmed.

Common Mistakes Sellers Make With the Amazon Holiday Calendar

Treating dates as fixed instead of planning ranges

Amazon doesn't give exact receiving times. They give estimates.

A seller who assumes "7 to 9 weeks before Prime Day" means exactly 56 days is planning for failure. The right approach is to ship earlier than the minimum window and track actual receiving speed as inventory arrives.

Inbound placement choices also affect timing. Sending inventory as minimal splits can mean longer transit and receiving. Sending inventory as Amazon-optimized placement can cost more in fees but get stock live faster.

There is no single right date. There's a range, and you adjust based on your cost tolerance and stockout risk.

Waiting for Amazon announcements before forecasting

Amazon announces Prime Day dates a few weeks before the event. That's too late to start inventory planning.

Operators forecast based on historical timing, place POs early, and adjust once dates are confirmed. Waiting for official announcements before ordering inventory is how sellers miss the event entirely.

The same applies to deal submission windows. Lightning Deals and Best Deals have limited slots. Waiting until Amazon announces the event means the best slots are already taken.

Ignoring inbound receiving, stock limits, and fee pressure

Sending inventory on time doesn't mean it's live on time.

FBA receiving can take days (for parcel shipments) or weeks (for LTL). Receiving speed varies by FC, time of year, and shipment volume across the network.

If you send inventory the week before Prime Day, it might not be checked in until after the event starts.

Stock limits and capacity constraints also matter. If your account has restock limits, you can't just send unlimited inventory. You have to prioritize which ASINs get space and manage around the cap.

And fee exposure is real. Low-inventory-level fees punish sellers who run too lean. Inbound placement fees reward sellers who accept Amazon's optimal placement even when it means higher cost. Storage fees hit hardest in Q4 when space is expensive.

Inventory planning is not just "send it early." It's balancing speed, cost, space, and risk.

FAQ: Amazon Seller Calendar and FBA Planning

Need Help Building an Amazon Inventory Plan?

Sellers who treat the calendar as a logistics problem tend to run out of stock. Sellers who treat it as a strategic planning problem tend to win.

SupplyKick helps brands build inventory strategies that account for demand forecasting, supplier lead times, FBA receiving windows, fee tradeoffs, and cash flow constraints. Whether you're managing FBA in-house or working with us as an agency partner, we can help you plan the year so you're in stock when it matters.