Converting a custom date format (string) to a datetime

Question

I have a large set (100+ million) of observations with the date represented as a custom string format. We did not generate the date strings, I just need to convert the date

Answer 1

Take a look at DateTime.ParseExact, e.g.

var dateTime = DateTime.ParseExact(
    "12 JUN 2010", 
    "dd MMM yyyy", 
    CultureInfo.InvariantCulture);

You can also specify a fourth parameter to set the Kind of date/time, for example if they are UTC date/times then you'd likely want to specify DateTimeStyles.AssumeUniversal.