sentences:  Adjusting window displays based on seasonal events, calendar dates, and consumerism-based holidays such as Christmas, Valentine's Day, and Father's Day can be a useful approach to encourage consumer purchasing.Choosing products that suit the season to display in the window can remind consumers to purchase gifts and provide gift ideas for the particular holiday.Window displays can be used to set trends; therefore, window display designers must always be one step ahead of trends and predict future fashion movements.