Americans spent a record $2bn online on Labor Day, making it one of the biggest online shopping days of the year and giving new hope to retailers ahead of the closely watched holiday season.

Online spending on Labor Day grew 23 percent to $2.08bn, from $1.69bn a year earlier, as shoppers bought big-ticket items like electronics, appliances, mattresses and grills, according to data from Adobe Analytics.

The data paint a picture of growing consumer confidence, as a low unemployment rate and signs of wage growth help boost sales for some of the country's largest retailers. Walmart, Nordstrom and Home Depot have all posted strong quarterly sales in recent weeks, and economists say they expect that momentum to continue through the end of the year.

“The numbers bear out that we’re in for a good holiday season,” said Michael Klein, director of retail industry strategy for Adobe. “Consumers were shopping for larger and more expensive products during Labor Day, after slower growth in the first half of the year."

The retail industry, which has weathered its share of economic challenges and bankruptcies since the Great Recession, had a particularly good holiday season last year. Sales rose 5.5 percent to $691.9bn in November and December 2017, marking the strongest growth in holiday retail sales in 12 years, according to the National Retail Federation. The lobbying group has yet to release this year’s holiday forecast.