So if you're one of those who buys items online as gifts, here are some critical deadlines for shipping presents.

With our own research and help from LastSleighDays.com, we put together this list for when your final deadline is.

Amazon

• Dec. 21: free two-day shipping: Order as late as midnight  9 p.m. PST (varies by item) and usually just Amazon-processed items, not just storefronts using Amazon.
• Dec. 23: one-day shipping (usually $2.99 per item. Same conditions as above.
• Dec. 24: local express delivery ($3.99 per item) while available only in select cities.

Aeropostale

• Dec. 19: standard: delivery, by 11 p.m. EST
• Dec. 21: express delivery.by 11 p.m. EST
• Dec. 23: priority mail, by 11 p.m. EST

Best Buy

• Dec. 20: standard: Dec. 20 by 3 p.m. EST
• Dec. 21: express: Dec. 21 by 1 p.m. EST
• Dec. 22: fastest mail rate, by 1 p.m. EST

Cabela's

• Dec. 18: standard: Dec. 18 by 10 p.m. EST
• Dec. 19: express: Dec. 19 by 10 p.m. EST
• Dec. 21: fastest, by 12 p.m. EST

Harry & David

• Dec. 18: standard: Dec. 18
• Dec. 20: express, by 10 a.m. PST
• Dec. 23: fastest: Dec. 23 by 10 a.m. PST

JCPenney

• Dec. 19: standard: Dec. 19
• Dec. 20: express: Dec. 20 by 2 p.m. CST
• Dec. 23: fastest: Dec. 23 by 2 p.m. CST

Macy's

• Dec. 21: standard: Dec. 21 by 11 p.m. EST
• Dec. 22: fastest: Dec. 22 by 5 p.m. EST

Nordstrom

• Dec. 21: standard: Dec. 21 by 11 p.m. EST
• Dec. 23: fastest 3 p.m. EST

USPS

• Dec. 20: standard (first-class): Dec. 20
• Dec. 21: express (priority mail): Dec. 21
• Dec. 23: fastest (priority mail Express).

Walmart

• Dec. 19: standard: Dec. 19
• Dec. 20: express: Dec. 20
• Dec. 22: fastest: Dec. 22

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