Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_69 ( pdt___7_utc_ VARCHAR, cdt___5_utc_ VARCHAR )

### Question ###
What is the time for PDT when CDT is 6:38 a.m.?

### Accurate SQL ###

SELECT pdt___7_utc_ FROM table_name_69 WHERE cdt___5_utc_ = "6:38 a.m."