US core retail sales during the 2024 holiday season had another straight record-breaking year, benefiting from strong macroeconomic indicators and consumer confidence in Q4. As usual, about one in four US online adults started their holiday shopping in October or earlier — and almost half finished after mid-December. Over two-thirds reported spending about the same as, if not more than, they did in 2023, and they shopped in both stores and online. This report reviews Forrester’s data on the shopping behaviors and attitudes of US online adults during the 2024 holiday season.