The day will officially be a bit longer than usual on Tuesday, June 30, 2015, because an extra second, or "leap" second, will be added.
From Jet Propulsion Laboratory/NASA
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Home → News → Nasa Explains Why June 30 Will Get Extra Second → Full Text
The day will officially be a bit longer than usual on Tuesday, June 30, 2015, because an extra second, or "leap" second, will be added.
From Jet Propulsion Laboratory/NASA
View Full Article
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