It has 366 days instead of the normal 365 days. The extra day is added in February, which has 29 days instead of the normal 28 days. Leap years occur every 4 years. 2016 is a leap year and so is 2020.
The difference between White males and females was 4.9 years, with life expectancies at birth of 75.7 and 80.6 years, respectively. White females could expect to live 3.8 years longer than Black females. Life expectancy has increased since 1970 for males and females in both racial groups.
In Europe, French women and Swiss women are predicted to have the highest life expectancy, with averages of 88.6 and 84 years respectively. Among predictions for high-income countries, the lowest life expectancy at birth is likely to be in the US, with an average of 83.3 years for women and 79.5 years for men -- similar to Mexico and Croatia.