It means that UPS will deliver the package by 8pm the second day after they receive it. If you give them a package by noon on a Monday they will deliver it by 8pm two days later, on Wednesday. That's why it's called 2nd Day Air, NOT 2 Day shipping.
more than likely Saturday
We received ours Wednesday. Ordered at around noon on Saturday. Order processed and shipped on Monday- two day UPS shipped from California to Florida.
Tuesday.
In almost all cases, the USPS delivers mail on Saturday, but not Sundays. Some circumstances such as extreme weather will force them to deliver on Sunday. However, there are two (formerly three) towns where mail is delivered on Sunday, and not Saturday. Those towns are Collegedale, TN and Angwin, CA, both home to large Seventh-day Adventist communities.
Saturday.
St. Valentine's Day is 51 days after Christmas Day. That's seven weeks and two days. Two days after Saturday is Monday.
Wednsday
The fastest shipping method is overnight shipping, offered by USPS, FedEx and UPS. It is also the most expensive. The most economical fast shipping option is USPS's priority mail flat rate boxes that deliver in two days.
Friday
Think about it, what day is it two days before Saturday? Look on the calender if you can't figure it out. Two days before saturday would be Thursday. If Thursday was yesterday, then today would be Friday.
Saturday