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Editorial Team
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Asked: 2026-05-20T14:45:54+00:00

In our production environment of 12 servers we have an issue with the code

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In our production environment of 12 servers we have an issue with the code 

var date = DateTime.Parse("Thu, 10 Mar 2011 13:15:33 GMT");

and this is not all the time and just on few of the servers (once per month maybe) it will throw the 

System.FormatException: String was not recognized as a valid DateTime.
at System.DateTimeParse.Parse(String, DateTimeFormatInfo, DateTimeStyles)

The date “Thu, 10 Mar 2011 13:15:33 GMT” is a real example for today it originates from another environment and is created in the following way

string.Format("{0:R}", ExpiresOn.ToUniversalTime())

The second day we plug servers back in the farm and they will continue to work fine.

  • There is any way to avoid this ?
  • Because this information is opaque for the consumers we think switching to ticks is this better ?
  • Any good practices ?

Thanks

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1 Answer

  1. Editorial Team

    Always use the CultureInfo.InvariantCulture. This is a rule. Use it for parsing of Dates, of numbers (especially floats/doubles/decimals), for ToString(ing) Dates, numbers (especially floats/doubles/decimals) etc. And if you handle date, always think if it would be better to handle them in UTC or in your local timezone. If you have to handle coordination between servers/persons in multiple timezones, always use (store) UTC dates.

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