title: Programmatically access Currency Exchange Rates from Yahoo Finance by Date
body: <p>I found the answer to <a href="https://stackoverflow.com/questions/181990/programmatically-access-currency-exchange-rates">this question VERY useful</a>, but I would like to also get exchange rates for dates in the past, not just today's exchange rates. I'm writing an iPhone app that uses the exchange rate to calculate money made from sales in different countries. </p>
  
  <p>Here's the example from the answer mentioned above to get today's echange rate for GBP to EUR:
  <a href="http://download.finance.yahoo.com/d/quotes.csv?s=GBPEUR=X&amp;f=sl1d1t1ba&amp;e=.csv" rel="nofollow noreferrer">http://download.finance.yahoo.com/d/quotes.csv?s=GBPEUR=X&amp;f=sl1d1t1ba&amp;e=.csv</a></p>
  
  <p>Does anyone know how to do this for any other dates?
  THANK YOU!</p>