Amazon delivery drivers and Starbucks baristas are on strike in a handful of U.S. cities as they seek to exert pressure on the two major companies to recognize them as unionized employees or to meet demands for an inaugural labor contract.

Thousands of Amazon workers went on strike Thursday, just ahead of busy shipping times. Here's everything to know and if you might see delays in deliveries.

Amazon workers have walked off the job at seven facilities throughout the U.S., including the company's Queens location in New York City, as they push for contract talks with their union.

The International Brotherhood of Teamsters said workers at seven Amazon facilities will begin a strike on Thursday morning.

Why are Amazon and Starbucks workers striking over the holidays? “This is a time when both companies make a lot of money,” one expert said.

Amazon delivery drivers and Starbucks baristas are on strike in a handful of U.S. cities as they seek to exert pressure on the two major companies to recognize them as unionized employees or to meet demands for an inaugural labor contract.

The Teamsters said the workers, who voted to authorize strikes in recent days, joined picket lines Thursday after Amazon ignored a Sunday deadline the

The Starbucks' baristas on the 1500 block of Walnut Street have joined other striking workers across the country and walked off the job.

Starbucks baristas walked off the job in major cities in Massachusetts, Texas and Oregon on Monday, expanding the dayslong holiday strike to 12 cities nationwide, according to the union Starbucks Workers United.

The union is striking in 10 cities, also including Columbus, Ohio; Denver and Pittsburgh, during the holiday season, which might impact Christmas sales.