How to get dates for fiscal quarters for report generation based on year

I am writing a store procedure , which generates reports for every fiscal quarter.

I am passing YEAR as input argument -- input_arg_year , and we have start and end ( day and months for fiscal quarters as constants)

now my question is how can i append start and end dates with the year( input_arg_year)  to form a valid date. which can be used further in my store proc, for report generation.
 Ex: Jan1st is quarter start date and input arg is 2008
       date = 01012008 .......something like this

let me know, how can i append and convert the string into a valid date.

give an example , so that can understand easily , i am a naive developer ( basically asp.net developer)
Swetha_aJaXAsked:
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jamesguConnect With a Mentor Commented:
to append start and end dates with the year( input_arg_year) , use ||
to convert a string to date, use sdstuber' s example

a quick example

declare
start_date varchar(10) := '0101';
input_arg_year varchar(10) := '2008';
startDate date;
begin
select to_date(start_date || input_arg_year, 'mmddyyyy') into startDate from dual;
--dbms_output.put_line(startDate);

end;
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sdstuberCommented:
given  a string '01012008'  that could be interpreted as ddmmyyyy  or mmddyyyy


so, depending on which way you intend your data to be structured you use the to_date function


for example....  

select to_date('01012008','mmddyyyy') date_format_1,  to_date('01012008','ddmmyyyy') date_format_2 from dual
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Swetha_aJaXAuthor Commented:
can you give some example of how to append the input argument with the date.

i tried this way -- qrtr_start_dt := '0101' + input_arg_date;

is the above interpretation correct?
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