Count the number of odd days from the year 2007 onwards to get the sum equal to 0 odd day. 

Year    : 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Odd day : 1    2    1    1    1    2    1    1    1    2    1    

 Sum = 14 odd days  0 odd days.

Therefore :: Calendar for the year 2018 will be the same as for the year 2007.