hat
Istorikman, te tan an egzak defini ak itilize a nan sundials. Yon tan ki koresponn a yon sèl jou a 1/24, yon 1/24 nan tan an ant de pasaj nan Solèy la nan Zenit la. Men, sa a Mondyal Clock a kalkile yon tan inivèsèl te kòrèk paske peryòd wotasyon Latè a varye yon ti kras sou ane yo.
eng
Historically, the exact time was defined with the use of sundials. A time corresponding to one day of 1/24, a 1/24 of the time between two passages of the Sun at the zenith. But this World Clock to calculate a universal time was incorrect because the Earth's rotation period varies slightly over the years.