CREATE TABLE table_26986076_5 (mon_23_aug VARCHAR(255), tues_24_aug VARCHAR(255))
When 21' 18.87 106.209mph is Tuesday August 24th what is Monday August 23rd?
    
SQL: SELECT mon_23_aug FROM table_26986076_5 WHERE tues_24_aug = "21' 18.87 106.209mph"