2nd Day air is a premium UPS service that delivers within 2 business days.
What is the latest time an order can be placed to assure it ships the out that same day?
The Lems warehouse will prioritize the shipping of these 2nd day orders. These must be placed by 1pm Eastern Standard Time Mon-Fri to ship out same day.
What is considered to be day 1?
The day after it is picked up by UPS from the Lems warehouse would be considered day 1. If it leaves Lems warehouse on Tuesday, it should arrive on Thursday. If it leaves Lems warehouse on Wednesday, it should arrive on Friday. Deliveries will happen at any time up to the end of the day on that second day.
Is this method guaranteed?
UPS 2nd Day Air is currently not one of UPS's guaranteed services.
https://www.ups.com/us/en/support/shipping-support/legal-terms-conditions/ups-service-guarantee.page
Does delivery always happen on Saturday if this is available for a customer's address?
Saturday delivery for 2nd Day air is dependent on zip code. This map shows a generalized breakdown of UPS Saturday air delivery reach.