Date normalization?

From: Nick Arnett <>
Date: Mon, 27 Apr 1998 07:39:51 -0700
Message-ID: <>

One of the uglier issues in threading messages is the need for date normalization. There is a small, but dependable percentage of messages that have obviously bogus date fields -- years in the past, years in the future. And there are a number of messages that use non-standard time zone indicators and GMT offsets. I can share some pseudocode that I've written, but it would be nice to come up with an agreed-upon way to identify bogus dates and normalize them as best as possible. Generally speaking, there's a good date somewhere in the headers, even if it's the date stamp from your SMTP daemon when the message arrived.

Reading threads in proper chronological order is a great boon, so I think this is worth the effort to make it consistent. I've even considered grabbing quoted text and searching for it in previous messages, when all else fails.



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Received on Mon 27 Apr 1998 04:48:29 PM GMT

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