title: How to create a pandas Timestamp object?
body: <p>It might sound like a trivial question, but I was not able to find proper documentation on this including help(pd.Timestamp) which does not provide a clear constructor.</p>
  
  <p>I want to create the last time stamp of eg day 2012-12-13, so hour is 23, minute is 59, seconds is 59, nanosecond is 999999999</p>
  
  <p>alternatively, if I have microsecond precision the last timestamp of a day would be as before except microsecond is 999999</p>
  
  <p>I need this to filter out all timestamps until a given (end of) day by indexing the original series by something like df.ix[:last_timestamp]</p>
  
  <p>Thx</p>