I would like to clarify the following, if we are on leave for 1 month continuously do we count it as 30 days or do we exclude Sundays and public holidays ?

my query is with reference to Annexure II leave calculations, on the students training guide 



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eg: say i take leave for the whole month of January 2011. now do i count it as 31 days or do i count it as 24 days (assuming 5 sundays and 2 public holidays)?