Keeping track of trends and selling dates in online retail is a lot, especially for a growing business. That’s why many sellers use a retail calendar to plan sales and promotions, line up inventory and staff, and stay ahead of the competition.

This guide explains what a retail calendar is, why it helps, and how to build your own. It also lists the key ecommerce dates for 2026 and 2027, with moving dates worked out for both years, to inspire your planning.

Key retail dates at a glance

These are the biggest moving dates. Fixed-date events are in the month-by-month list below.

Event	2026	2027
Chinese New Year	Feb 17	Feb 6
Pancake Day (UK)	Feb 17	Feb 9
Mothering Sunday (UK)	Mar 15	Mar 7
Good Friday (Western)	Apr 3	Mar 26
Easter Sunday (Western)	Apr 5	Mar 28
Mother’s Day (US)	May 10	May 9
Memorial Day (US)	May 25	May 31
Father’s Day (US and UK)	Jun 21	Jun 20
Labor Day (US)	Sep 7	Sep 6
Thanksgiving (US)	Nov 26	Nov 25
Black Friday	Nov 27	Nov 26
Cyber Monday	Nov 30	Nov 29
Hanukkah	Begins at sundown Dec 4, ends Dec 12	Begins at sundown Dec 24, ends Jan 1, 2028
Super Saturday (last Saturday before Christmas)	Dec 19	Dec 18

What is a retail calendar?

A retail calendar is a schedule that retailers use to plan for key sales events, holidays, and other important dates through the year. You might also hear it called a retail promotional calendar, a retail marketing calendar, a merchandising calendar, or a sales calendar. They all describe the same idea: a plan that lines up inventory, staffing, marketing, and promotions ahead of each season, holiday, or special occasion.

What are the benefits of using an ecommerce calendar?

A retail calendar is a visual guide to your busy periods. When you know which selling days or seasons are coming, you can forecast more accurately, meet seasonal staffing needs, and run promotions with confidence. These are the benefits businesses typically see.

Better inventory management

A calendar gives you a view of the retail cycle, including key sales and events, which helps you avoid stockouts and overstock. If you know when demand will rise, you can adjust inventory ahead of time, so you have stock for customers, whatever the season.

Improved marketing

A calendar records the dates you can target with specialized campaigns. Combined with historical sales data, it helps you predict future trends and build campaigns around key dates to drive sales and brand visibility.

Targeted promotions

When you know a holiday is coming, you can plan a matching sale or offer. A calendar also stops promotions overlapping, overwhelming your audience, or discounting so heavily that it threatens profit.

More efficient staffing

Staffing needs follow the calendar, especially for seasonal businesses. Right-sized teams improve the customer experience, shorten wait times, and speed up order processing. Some holidays, such as Christmas, are easy to plan for, but others, such as Easter, move each year, and your industry may have its own busy seasons.

How to plan the year using a retail calendar

You can build a calendar from a template, from scratch, or with a premade planner. Pick the approach that suits your business and adapt it. A good calendar includes:

• The event or sales date, and a short description
• The theme or promotion you’ll run
• Deadlines: when stock must arrive, when listings go live, when ads and emails start, and your last shipping cut-off
• Who’s responsible, and which teams need to be involved

Work backward from each date. For a key event, list what has to be done before it, and when, so that nothing arrives late. You might keep more than one calendar, for example, one for key events and one for social media content.

The 4-5-4 calendar

Many retailers use a 4-5-4 calendar to compare sales between years. It divides the year into 52 weeks and splits each quarter into three periods of four, five, and four weeks, so each period contains the same number of weeks and the same days of the week. That makes year-over-year comparisons fairer than calendar months.

Key ecommerce events and holiday selling periods

Here are key dates and selling periods to keep in mind. Dates apply to the US unless noted, and they’re worked out for 2026 and 2027 where they move.

January

January is the month of new beginnings, with health and well-being offers, and a chance to move leftover stock with sales.

• New Year’s Day (Jan. 1): Shoppers have new resolutions and are ready to start the year well.
• Dry January (all month): Many people give up alcohol and look for other ways to have fun and improve their health.
• Post-holiday returns and sales: Returns peak, and many retailers clear stock.

February

February is the doldrums of winter in the Northern Hemisphere, but it holds Valentine’s Day and the biggest sporting event of the year in the US. Social media is a strong way to promote offers and start conversations.

• Chinese New Year (Feb. 17, 2026; Feb. 6, 2027): Celebrated in many parts of the world.
• Black History Month (US, all month): Recognizes the achievements and contributions of African Americans. In the UK, it’s observed in October.
• Valentine’s Day (Feb. 14): A major gifting date.
• Pancake Day (UK, Feb. 17, 2026; Feb. 9, 2027): Shrove Tuesday, the day before Lent begins.
• Super Bowl (early- to mid-February): The biggest television and advertising event in the US. Check the NFL schedule for the date.

March

Spring arrives, with International Women’s Day, St. Patrick’s Day, and Mother’s Day in the UK. These are good moments for launches, seasonal collections, and support for causes.

• World Book Day (UK, Mar. 5, 2026; Mar. 4, 2027): Held on the first Thursday of March in the UK and Ireland.
• International Women’s Day (Mar. 8): Celebrates the achievements of women and calls for gender equality.
• Mothering Sunday (UK, Mar. 15, 2026; Mar. 7, 2027): The fourth Sunday of Lent.
• St. Patrick’s Day (Mar. 17): A celebration of Irish heritage and culture.
• First day of spring (Mar. 19 to 21): Shoppers turn to spring cleaning, gardening, and the outdoors.
• March Madness (mid-March to early April): The college basketball tournament in the US.

April

April has standing dates and, in many years, Easter.

• April Fool’s Day (Apr. 1): Pranks and playful campaigns.
• Good Friday (Apr. 3, 2026; Mar. 26, 2027) and Easter Sunday (Apr. 5, 2026; Mar. 28, 2027): For Western Christians. Orthodox Easter is Apr. 12, 2026, and May 2, 2027. Many businesses close, but retailers often see a last-minute rush.
• Earth Day (Apr. 22): A day to raise awareness of environmental issues.
• World Book Day (UNESCO, Apr. 23): Celebrates books and reading.

May

Wedding season, UK bank holidays, and Mother’s Day and Memorial Day in the US give online retailers plenty to plan for.

• Early May bank holiday (UK, May 4, 2026; May 3, 2027).
• Mother’s Day (US, May 10, 2026; May 9, 2027): The second Sunday of May.
• Memorial Day (US, May 25, 2026; May 31, 2027): The last Monday in May, and the unofficial start of summer.
• Spring bank holiday (UK, May 25, 2026; May 31, 2027).
• Graduation season (May and June): Students graduate from high school and college.

June

Pre-summer sales and social campaigns matter, and Father’s Day is an opportunity for gifting and brand awareness.

• Pride Month (June): A celebration of the LGBTQ+ community.
• Juneteenth (US, June 19): A federal holiday.
• Father’s Day (US and UK, June 21, 2026; June 20, 2027): The third Sunday in June.
• Summer sales: The month is an opportunity to push warm-weather and vacation products.

July

July continues the summer season and has Independence Day in the US. It has also become a key month for Amazon Prime Day. Amazon sets the dates and often confirms them only a few weeks ahead, so plan for it in advance. See our guide to preparing for Amazon Prime Day.

• Independence Day (US, July 4): A federal holiday celebrating American independence.
• Amazon Prime Day (dates set by Amazon): In recent years, it has run in June or July, and Amazon has also held an autumn event.
• Peak summer: Customers look for outdoor and vacation products.

August

As summer winds down, it’s time to sell old stock and plan your autumn marketing. Many families shop for school in August.

• Back-to-school season: Clothing and school supplies. In the US, it runs from mid-summer into September.
• Summer bank holiday (UK, Aug. 31, 2026; Aug. 30, 2027).
• End-of-summer sales: Clear inventory with end-of-season offers.

September

The end of summer is a good time to focus on back-to-school promotions or a new seasonal collection, and to get peak season preparation under way.

• Labor Day (US, Sept. 7, 2026; Sept. 6, 2027): The unofficial end of summer, with some of the biggest sales of the season.
• Fall fashion: Customers update their wardrobes as the weather cools.
• Peak preparation: Finalize stock, tools, and plans. See our peak season ecommerce guide.

October

October is best known for Halloween, but it has other selling opportunities too.

• International Coffee Day (Oct. 1).
• World Animal Day (Oct. 4).
• Black History Month (UK, all month).
• Halloween (Oct. 31): Costumes, decorations, and candy.
• Pre-peak preparation: Many sellers finish tool setup and catalog work this month.

November

November kicks off the holiday season with Thanksgiving in the US, and the biggest online shopping days of the year.

• Singles’ Day (Nov. 11): A major shopping day that began in China and has spread to other markets.
• Thanksgiving (US, Nov. 26, 2026; Nov. 25, 2027): The fourth Thursday of November.
• Black Friday (Nov. 27, 2026; Nov. 26, 2027): One of the largest shopping days of the year. See our Black Friday and Cyber Monday guide.
• Small Business Saturday (US, Nov. 28, 2026; Nov. 27, 2027).
• Cyber Monday (Nov. 30, 2026; Nov. 29, 2027): Picks up where Black Friday leaves off, as more purchases move online.
• Giving Tuesday (Dec. 1, 2026; Nov. 30, 2027): A day of charitable giving after Cyber Monday.

December

December is the busiest shopping period of the year for many online retailers, with religious holidays that many people celebrate, and the end of the year. Tailor your marketing and advertising around the holidays and create gift guides.

• Hanukkah (begins at sundown Dec. 4, 2026, ends Dec. 12; begins at sundown Dec. 24, 2027, ends Jan. 1, 2028): An eight-day Jewish festival.
• Super Saturday (Dec. 19, 2026; Dec. 18, 2027): The last Saturday before Christmas, a big day for last-minute shopping.
• Christmas (Dec. 25): Most of the gift buying and ecommerce in the fourth quarter is driven by this holiday. Check your shipping cut-off dates.
• Boxing Day (Dec. 26): A public holiday in the UK, Canada, and other countries, and a big sales day.
• New Year’s Eve (Dec. 31).

For product ideas, see our guide to what to sell at Christmas and during the holiday season. For tips, see increasing your Christmas sales.

Planning for success

This list covers the major holidays and selling seasons, but it’s far from complete. Your important dates depend on your industry, your customers’ habits, and where you sell. Not every date will be relevant, so go where your customers are instead of trying to hit every occasion.

A retail calendar is one tool for planning growth. Pair it with demand forecasting and inventory planning. See our guide to peak season inventory planning, and our top tips for succeeding on online marketplaces.

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