Queries :: Calculates Number Of Days / Month / Year

I am building a report and need to know the coding in the query (or in the report) to achieve the following.

Currently, in my query - 3 fields that work fine:

AppDate - dates of set appointments (Appt)

MonthNo: DatePart("m",[App_Date]) - get Month value

YearNo: DatePart("yyyy",[App_Date]) - get Year value

What I need is : EXACT coding to get these counts to show in my report:

January 2013
12 appointment (there were a count of 12 appts in January)
over 23 days (there were 23 days where appts were booked in January)
of 31 days (total number of days in the month of January)

February 2013
18 appts (there were a count of 12 appts in February )
over 19 days (there were 23 days where appts were booked in January)
of 28 days (total number of days in the month of February )

etc.