I just did a quick hairy-eyeball calculation; i.e., I looked at the calendar. It seems that the longest six month period would be from 1 July to 31 Dec. Only two 30-day months included. As a bonus, 31 Dec may be a holiday, as is 1 Jan of course so there are two extra days in that effective six-month period. So 184 days plus whatever for a bank holiday or two at the end. On the other hand, 1 Jan through 30 June would be the shortest six month period; 2 30 day months and one 28-day. So, 181 days.
Three days at most difference between longest and shortest six month periods in terms of number of days. I can't imagine anyone but the most anal CPA or bank president is going to get too uptight about the issue - this is one of those situations where the relative randomness of depositing and borrowing will balance out the minuscule differences in actual length of one six-month period vs. another or one 15-year mortgage period vs another. So Paul was about right IMHO, 15 March to 14 September is six months. As is 15 January to 14 June, etc. stan On Oct 13, 2012, at 7:20 PM, John Sessoms wrote: > Y'all still miss the point. > > I already know *HOW MUCH* the interest would be. The formula for simple > interest future value is A=P(1+ni) where n = 0.5 (six months == 0.5 > years). I looked it up. > > I don't care how much the interest is or whether it's a penny more or a > penny less. > > What I want to figure out is *WHEN*, i.e. for any Purchase DATE=X, when > is the Maturity DATE=Y where the term = "six months". > > Paul's answer is close to what I'm looking for. March 15 -> September > 15. I'm looking for the formula that gives the answer for any date? > > Whiskey later, after I finish my house work. > > From: "John Mullan" > >> With todays interest rates it is probably LESS than a penny, unless >> you have some ridiculously large amount of money in the CD. >> >> jm >> >> -----Original Message----- >> From: J.C. O'Connell >> Sent: Saturday, October 13, 2012 1:33 PM >> To: 'Pentax-Discuss Mail List' >> Subject: RE: OT: Why won't the internet just answer the stupid, question? >> >> with today's interest rates, a few days is literally pennies... >> ----------------- >> J.C.O'Connell [email protected] >> ----------------- >> >> -----Original Message----- >> From: PDML [mailto:[email protected]] On Behalf Of Paul Stenquist >> Sent: Saturday, October 13, 2012 1:25 PM >> To: Pentax-Discuss Mail List >> Subject: Re: OT: Why won't the internet just answer the stupid, question? >> >> All six month CDs I've purchased matured on the same date six months later. >> For example, a CD purchased on March 15 matures on September 15. In any case >> a difference of a day or two is a matter of pennies, so it's not worth >> getting worked up about IMO. Steve's suggestion of whiskey is a good one. >> >> On Oct 13, 2012, at 12:23 PM, John Sessoms <[email protected]> wrote: >> >>> Credit Union - "six month" CD. I *will* ask the Credit Union when it >>> opens on Monday. >>> >>> If I purchase a "six month" CD on any DATE X, how do I calculate the >>> actual DATE Y when the CD will mature? >>> >>> Unfortunately, the Credit Union was already closed on Friday before the >>> question occurred to me. >>> >>> Meanwhile, it's now Saturday afternoon, the problem is still banging >>> around inside my head and won't give me any rest. The text from my most >>> recent math class only does 90 & 180 day simple interest loans & >>> revolving credit charges before jumping straight to compound interest >>> for car loans & 30 year mortgages. >>> >>> The answer may be on the internet, but has so far eluded me. I am >>> prepared to accept that I may not be phrasing my stupid question the >>> right way, so if anyone has ideas ... >>> >>> From: "John Mullan" >>> >>>> Because there are many different ways it is best to ask the bank in >> question >>>> what method they use. Is it savings or loan, each uses a different >>>> approach. >>>> >>>> jm >>>> >>>> >>>> -----Original Message----- >>>> From: John Sessoms >>>> Sent: Friday, October 12, 2012 10:29 PM >>>> To: [email protected] >>>> Subject: OT: Why won't the internet just answer the stupid question? >>>> >>>> Trying to figure something out and the answer is NOT on the internet. >>>> And it's not in my math textbook in the section that tells you how to >>>> figure interest. >>>> >>>> How long is "six months" to a BANK? >>>> >>>> Jan 1 to June 30 has a different number of days (181) than Mar 1 - Aug >>>> 31 (184) and I know banks don't do it that way. >>> > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
