[Haskell-cafe] Help parsing dates and times

[Bjorn Bringert]

On Oct 16, 2007, at 16:16 , Bjorn Bringert wrote:

> On Oct 16, 2007, at 2:25 , Don Stewart wrote:
>
>> jgbailey:
>>>    I am trying to parse various date and time formats using the  
>>> parseTime
>>>    function found in (GHC 6.6.1) Data.Time.Format. The one that  
>>> is giving me
>>>    trouble looks like this:
>>>
>>>      2008-06-26T11:00:00.000-07:00
>>>
>>>    Specifically, the time zone offset isn't covered by the format  
>>> parameters
>>>    given. I can almost parse it with this:
>>>
>>>      %FT%X.000
>>>
>>>    But that doesn't take into account the "-07:00" bit. I'm sure  
>>> this has
>>>    been solved - can someone point me to the solution? Thanks in  
>>> advance.
>
> Try %z
>
> (see http://www.haskell.org/ghc/docs/latest/html/libraries/time/ 
> Data-Time-Format.html#v%3AformatTime for all the format specifiers).
>
>> Is there anything in the parsedate library?
>>
>>     http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ 
>> parsedate-2006.11.10
>>     http://hackage.haskell.org/packages/archive/parsedate/ 
>> 2006.11.10/doc/html/System-Time-Parse.html
>>
>> -- Don
>
> parsedate is obsolete, unless you have ghc < 6.6.1. It was  
> rewritten to become what is now the date parsing code in the time  
> package.

Hmm, perhaps I should clarify this: parsedate and time-1.1.1 (which  
comes with GHC 6.6.1) have different APIs. parsedate produces  
CalendarTimes, and the code in time-1.1.1 produces the new time and  
date data types. So I guess parsedate isn't actually obsolete,  
rather, it's for use with the package currently known as 'old-time'.

/Björn