Yimuphi usuku lokuzalwa oluvame kakhulu e-United States?
Context:E-United States phakathi kuka-1973 no-1999, uSeptember 16 usuku lokuzalwa oluvame kakhulu e-United States futhi uDisemba 25 usuku lokuzalwa olungavamile kakhulu (ngaphandle kukaFebhuwari 29, ngenxa yeminyaka ye-leap). Ngo-2011, u-October 5 no-6 kwabikwa ukuthi yiwona malanga okuzalwa avame kakhulu.
Izinsuku zokuzalwa ezazingavamile kakhulu e-United States phakathi kuka-1973 no-1999 kwakungu-February 29 ngenxa yeminyaka ye-leap.