1999.2.7 is several years older than 200 1.2.7.

99 years, 0 1 year, two years. Because: 1999 to 200 1 is two years, 200 1? 1999=2。 People born in 1999 will be two years old by 200 1, and children born in 1999 will be two years old by 200 1. So people born in 1999 are two years older than those born in 200 1.