http://lsac.org/jd/lsat/test-dates-deadlines/2017-2018/us-canada-june

Late registration is May 3. 

Registration for September and later LSATS will open up in mid-May 2017. 

The LSAT is only administered four times each year at designated testing centers throughout the world. You can register to take the LSAT in a different country if you will not be in the U.S. for the June LSAT.  

Note: All international LSAT administrations, Saturday Sabbath Observers LSAT administrations, and US, Canadian, and Caribbean February LSAT administrations are nondisclosed.