CREATE TABLE table_name_22 (date VARCHAR(255), uci_rating VARCHAR(255), race_name VARCHAR(255))
What is the date of the omloop van de vlaamse scheldeboorden race with a UCI rating of 1.1?
    
SQL: SELECT date FROM table_name_22 WHERE uci_rating = "1.1" AND race_name = "omloop van de vlaamse scheldeboorden"