Premature birth implies a newborn which is not fully developed and therefore less than able to attain a status of 'thriving' with some even likely to expire before they've even began to really live.
World Prematurity Day comes around each November 17 since 2008 (with official recognition in 2011) in an effort to bring awareness of preterm birth children to the fore in the presence of some 15 million such babies being born annually.
Those birth defects and other perinatal disabilities prematurity cultivates in newborns limiting their survival rates is the aim of the understanding to be imparted by this day which has become an international observance.