For Detail : https://www.dvlottery.state.gov/https://www.dvlottery.state.gov/
The entry submission period for DV-2015 is from 12:00PM EDT (GMT -4) on October 1, 2013 to 12:00PM EDT (GMT -4) on November 2, 2013. The entry form will only be available for submission during this period and this period only. Entries will NOT be accepted through the U.S. Postal Service. After reading the instructions, scroll down and click on “Begin Entry” to enter the DV Lottery.