SQL Server agent is used to schedule a job that has to run periodically. If you are a DBA, one of your admin tasks is to schedule jobs. Suppose you are in a situation to run a set of codes every alternate Saturday, you can do it using the following steps:
Open SQL Server Management Studio (SSMS). Under SQL Server agent, create a new job named test. Click on Schedules and button called New.
A new window will popup. Under frequency section, select weekly for "Occurs" option. Select 2 on "Recurs every" option. Under days option choose "Saturday". Click ok.
Now the job will run every alternate Saturday on the time specified.