Hi All,

Can any one help me to calculate number of sunday's in a given month and year using apex and vf page.

Ex: If i select March 2017 from vf page, i need to calculate number of sunday's from selected month and year.

Thanks in advance.

Hi All,

When I have tried to execute the query as 
        "Select Id, Subject from ActivityHistory"

in 'Query Editor' from the developer console in the context of 'System Administrator'.

After executing the query, I got the error as  "entity type ActivityHistory does not support query"

Can anybody will help me how to solve this error?

Thanks