Category talk:Release notes

I noticed a number after the category on a number of these. For example this one. I don't see where that number is documented. Could someone please cover it so I can be sure to have the correct number in there? thanks --Drmike 11:57, 12 April 2012 (UTC)
 * Month and day of month to be used as a sort key, but not only are most misfiled anyway, even if they were filed correctly, it wouldn't work very well. Having them all filed under the default R for "Release notes" is awkward, but there really isn't a better way since January, October, November, and December would all get filed under 1 with this scheme. At least under R, they'll be in correct date order at least. I'll remove them with a bot in a moment. &mdash; Eyes  [[Image:User-Eyes-Sig.png|link=User talk:Eyes]] 12:19, 12 April 2012 (UTC)