Ma'anar ƙamus na "ma'anar ranar rana" shine matsakaicin tsawon yini a cikin tsawon shekara guda, kamar yadda motsin Rana ke gudana a sararin sama. Shi ne tazarar lokaci tsakanin tazarar madaidaicin rana guda biyu a jere a cikin madaidaicin rana, kuma ana amfani da shi azaman tushen lissafin lokaci a yawancin sassan duniya. Ma'anar ranar hasken rana ya ɗan ɗan tsawo fiye da ainihin ranar hasken rana, wanda ya bambanta saboda kewayawar duniya da ke kewaye da Rana da wasu dalilai.