Incorrect day of week: foo

If included, day-of-week must be the day implied by the date specification.

As an example, the following is an incorrect date:

<pubDate>Sat, 31 Dec 1999 23:59:59 EST</pubDate>

The following is a corrected example:

<pubDate>Fri, 31 Dec 1999 23:59:59 EST</pubDate>

This may be indicative of a more significant software error in the formatting of dates that needs to be corrected.

If it turns out that computing the correct day of week is impractical using the software you have available, then RFC 822 permits omitting both the day of the week and the subsequent comma from the value.