Isra and Mi'raj for the year 2015 is celebrated/ observed on sundown of Friday, May 15th ending at sundown on Saturday, May 16th.
According to the Islamic calendar Isra and Mi'raj falls on the 27th day the seventh month of Rajab. For Muslims this day relates to Prophet Mohammad's trip from Mecca to Jerusalem and his ascension into heaven.
Days to Isra and Miraj 2015
Saturday, May 16th is day number 136 of the 2015 calendar year with -8 years, -6 months, -14 days until Isra and Mi'raj 2015.