title: Import customer reporting schedule into Google Analytics
body: <p>The company I work for has a custom reporting schedule, similar to the month specific groups four or more weeks are grouped into 'periods'. I have a mapping from date to period that I wish to upload to Google Analytics using its data import function.</p>
  
  <p>When I get to selecting the schema on the data import tool there is no option to select the date as the key to join my data on.</p>
  
  <p>Is this possible in Google Analytics? What is the correct method? </p>