Articleship leave calculation

Dear Sir/Madam, I want to calculate my article completion date.... please help me... There are 2 cases : 1) I have completed my 1st year of training from CA Firm(26/06/2014 to 25/06/2015) with 83 days leave for examination. 2) Currently i'm working in a CA Firm where the concept of Credit leave is followed that if we worked for sunday the we will get 1 credit leave for each day ,as of now of i have 50 credit leaves in my Account. means at the end of Articleship 50 days will be less from my completion date. i have taken 63 days of leave as of now for exams. when i asked my Admin staff they told me that we will do the calculation for 2 years only & for 1st year which you served somewhere else institute will do the calculation . My articleship Completion date is 27/07/2017... please help me to find out my exact completion date....