National Stationery Week 2026 runs from Monday 11 May to Sunday 17 May 2026. The official campaign site describes it as an annual celebration of stationery and says the week is open to everyone, including businesses and consumers. It is a UK-led industry and consumer campaign. The official site says it unites suppliers, retailers, and consumers, and calls it “the biggest marketing opportunity of the year” for stationery brands and retailers.