# How are days counted when funding a new account within 10 days

I just opened a new CD today and it told me I have 10 days to fund the account. I think the specific wording said "within 10 days." I'd like to know how these days are counted as I am unsure if any of the following concerns apply:

1) Are these calendar days or business days so the weekend and holidays don't count.

2) Does today (5/22) count putting day 10, assuming 10 calendar days, at 5/31 or is tomorrow the first day with day 10 being 6/1?

3) By saying "within", could the account be funded on the final day?

• What does it mean to "open a new CD" and then have ten days to fund it? If it is a one-year CD with today's date on it, does it mature a year from now yesterday? And if you have ten days to "fund the account" does the bank give you up to ten days of interest for free, and return your money plus interest a year from yesterday when the CD matures? Or is the maturity date fixed to be a year from yesterday, and you get interest from the day you funded the account till maturity? – Dilip Sarwate May 23 '12 at 1:44
• All great additional questions! I'm starting to realize us laypeople are really at a disadvantage when it comes to the subtle nuances and intricacies of exactly how banking works. – Aaron May 23 '12 at 13:31
• So what you did was not "open a CD account" but get a rate quote from your bank: "We will accept a deposit from you (and issue you a Certificate of Deposit) for a period of n months/years at interest rate x% compounded quarterly/monthly? if you send us at least \$Y within the next 9 calendar days." So (say) a one-year CD will be issued on the day that your bank receives your deposit and will mature a year later, not as of the date you "opened a CD account" and to mature a year from then. – Dilip Sarwate May 24 '12 at 1:40
• Yes I suppose that's exactly what happens from the bank's point of view. They just use simpler terminology for users since, with the exception of this case, we'll treat opening it and funding it as the same action and don't normally see or process the additional time bound quote phase. – Aaron May 24 '12 at 16:04