Established in 1989 by the Local Post Collectors Society, World Local Post Day is the last Monday in January, which happens to be today. You'll find a number of local posts doing special stamps and cancellations in honor of today. You can read previous L.W.A. articles on local posts around the world here & here. Oh, hey, look! There's a whole blog category for Local Post. Thanks to Kevin at Philosateleian Post for the reminder! 
P.S. The new postage rates are in effect today!
I think the URL you wanted is http://localpostcollectors.org/ -- the URL in the post goes to a parked domain. Sadly, though, the actual LPCS site looks to be largely busted. Well, the Philosateleian Post is still going strong!
Posted by: Joe F. | January 28, 2019 at 05:43 PM
That's the correct URL, Joe. Our new webmaster is still working on putting together an updated website, but yes, the LPCS is still active--and yes, so is Philosateleian Post. Thanks to Donovan for the mention!
Posted by: Kevin | January 28, 2019 at 10:07 PM
I exchange with Dave Snyder! I love seeing one of his covers here - he is famous!
Posted by: Marti Schrock | January 29, 2019 at 10:29 AM
Kevin: that's wonderful news! Be sure to prevail upon the excellent LWA Guildmistresses to make an announcement once the new site is completed.
Posted by: Joe F. | January 29, 2019 at 12:48 PM