ML will be counted form 25.01.2016 to 11.2.2016 (18 days). Even if it was a vacation, i.e., the period of holidays were 7 days or more, ML would have been counted from 25.01.2016 in this case.
But if it was a vacation, i.e., the period of holidays were 7 days or more and the incumbent remained absent on 22-01-2016 (the closing day), the ML would have been counted from 22.01.2016.