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I festeggiamenti per l'arrivo del 2017 saranno un po' più lunghi: la notte tra San Silvestro e Capodanno conterà infatti un secondo in più per sincronizzare gli orologi di tutto il mondo. In Svizzera la prima ora del nuovo anno sarà quindi un po' più lunga.
Il cambiamento sarà effettuato per fare in modo che il tempo misurato dagli orologi sia sincronizzato con quello astronomico. La velocità di rotazione della Terra non è infatti costante ed è quindi necessario intervenire con i cosiddetti "secondi intercalari".
Fino ad oggi di questi secondi ne sono stati aggiunti 26, l'ultimo dei quali il 30 giugno 2015.
ATS/sf
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