Christine running in her heat of the women's 400m at the 2015 World Championships
which she won in 50.53 seconds. She then qualified for the final as runner up
in her semi final.
In the gold medal winning relay team of Jamaica she ran the first leg,
Shericka Jackson, Stephenie Ann McPherson and Novlene Williams-Mills
followed her.
 
Final women's 400 metres.
2015 World Championships Beijing, China.
    
        
            | 1. 
 | Allyson | FELIX | USA | 49.26 | WL 
 | 
        
            | 2. 
 | Shaunae 
 | MILLER | BAH | 49.67 | PB 
 | 
        
            | 3. | Shericka 
 | JACKSON | JAM | 49.99 | PB 
 | 
        
            | 4. | Christine | DAY | JAM | 50.14 | PB 
 | 
        
            | 5. | Stephenie Ann | McPHERSON | JAM | 50.42 | 
 | 
        
            | 6. | Novlene | WILLIAMS-MILLS | JAM | 50.47 | SB 
 | 
        
            | 7. | Phyllis | FRANCIS | USA | 50.51 | 
 | 
        
            | 8. | Chrisine | OHURUIGU | GBR | 50.63 | 
 | 
    
 
ANNUAL PROGRESS: 
 
2006   55.33  	Kingston (JAM)	24 JUN 2006
2007   53.91   Kingston (JAM)	23 JUN 2007
2008   53.10   Kingston (JAM)	28 JUN 2008
2009   51.54  	Kingston (JAM)	28 JUN 2009
2010  	52.43  	Kingston (JAM)	26 JUN 2010
2011   52.08   Kingston (JAM)	16 APR 2011
2012   50.85   Kingston (JAM)	30 JUN 2012
2013   50.91  	Kingston (JAM)	22 JUN 2013
2014   50.16   Kingston (JAM)	29 JUN 2014
2015   50.14   National Stadium, Beijing (CHN)	27 AUG  2015 (Personal best)
2016   50.29   Kingston (JAM)	03 JUL 2016
2017   51.25   Kingston (JAM)	24 JUN 2017
2018   51.41   Kingston (JAM)	24 JUN 2018
2019   51.34   Kingston (JAM)	22 JUN 2019
2021   52.33   Kingston (JAM) 26 JUN 2021