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Dec
3
comment How do I find when an URL was first indexed by Google?
@Stephen & Zistoloen: That is not generally the date when the page was first indexed by Google. Based on some testing, the date shown via this method appears to be either pulled from the content of the page (if Google thinks it sees something that looks like a "published on" or "last modified on" date) or, if no such date is found in the content, based on the date when Google last observed a (substantial?) change to the page. Of course, if the page was never changed after its first publication, this might happen to be the same as its publication date, but there's no guarantee of that.
Dec
3
comment How do I find when an URL was first indexed by Google?
It's quite possible that the answer is "no". Google may not even store this information (since there's no particular reason why they'd have to), or, even if they do, they may not expose it to third parties.
Nov
5
awarded  seo
Oct
29
awarded  Nice Question
Oct
28
comment Does Google ignore robots.txt
Agreed. Except for the misleading first sentence pointed out by @unor, this would be an excellent answer.
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Sep
21
revised Mass deletion of spam revisions in Mediawiki
rewrite based on anon edit suggestion, describe the process in more detail
Aug
29
answered Can I legally use a competitor's business name on my site to compare products?
Aug
29
revised Remove extension from URL using a rewrite without resulting in a redirect loop
deleted 1 character in body
Aug
29
comment Remove extension from URL using a rewrite without resulting in a redirect loop
+1, this may be cleaner than my solution.
Aug
29
answered Remove extension from URL using a rewrite without resulting in a redirect loop
Aug
25
answered When Google gives up recrawling 301 that led to 404?
Aug
24
comment Apache Rewrite Rule non-www to www + http to https + remove trailing slash
Re: the bounty, is there something specific you'd like more "credible and/or official sources" for?
Aug
24
reviewed Approve Apache Rewrite Rule non-www to www + http to https + remove trailing slash
Aug
22
revised Mass deletion of spam revisions in Mediawiki
fix broken github link, rm old wiki link, use protocol-relative URLs, remove obsolete warning
Aug
22
awarded  Necromancer
Aug
21
revised 301 redirect to 404 page or set status code to 404 and stay on page?
added 557 characters in body
Aug
21
answered 301 redirect to 404 page or set status code to 404 and stay on page?
Aug
21
comment 301 redirect to 404 page or set status code to 404 and stay on page?
The use of 401 for authentication methods other than HTTP Basic or Digest auth (or other RFC2617-compatible auth schemes) has been discussed here before; my opinion at the time, which I still stand by, is that it may work in practice, but it's not really valid according to the HTTP spec, and that in any case, 403 or even 404 would be preferable.