According to ST's post in their free PSO JP BBS, the Famitsu event will end on February 10, at midnight JP time. At this time the final change/ending event will take place in the Singing By The Beach quest. The
Famitsu Cup Counter will also be stopped at this time. However, the Famitsu Cup Maximum Attack 2 and Singing By The Beach quests will be up til February 17th, you can still play it til the 17th but the counter will be stopped at the above mentioned date. The ST BBS post can be read
here.
Also, the site for applications to exhange GC ver 1 to ver 1.1,
http://www2.sega.co.jp/ and PSO BBS site will be down starting on 10 am Wednesday, February 19, until 6 pm for server upgrades. This news can be read
here. The BBS that will be down are: PSO Comprehensive free BBS, Comprehensive secret BBS, PSO PC free BBS and PSO PC secret BBS.