I have time series data about the birds migration. The birds migrated to some area in specific months in a year e.g. SEP, NOV, DEC, JAN, FEB, MAR. I want to use 'SARIMAX' model for forecasting. The model create problem because the data for the month MAY, JUN, JUL, AUG are missing in each year as give below. 
can anybody help me in solving this problem??
Thanks
