I will probably opt for a quieter reading at home.
Info on Tolkien Reading Day from the British Tolkien Society:
http://www.tolkiensociety.org/ed/tolkienreadingday.html
If you happen to be in Germany - there'll be readings (in German) organised by the German Tolkien Society throughout the country:
http://www.tolkiengesellschaft.de/6859/dtg-veranstaltungen-zum-tolkien-lesetag/
For those in Denmark, I'll cite a good friend from the Danish Tolkien Society:
The Danish Tolkien Society is proud to announce that this year's Tolkien Reading Day will be held at the art museum "Arken" in Copenhagen, to the background of Queen Margrethe II's LotR-inspired art. The event has been approved by the royal Danish court and wil be attended by local press - we're thrilled to be there and hope to see as many Tolkien fans as possible attend! The details can be found in our group here on Facebook or on www.bri.dk (Danish only).
And I'm sure there are other events in your area.