They view the calendar as portending the end of one era and heralding the start of a new one, not the death of all the world's species.

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It's the closest any golfer of the modern era has been to a calendar grand slam -- a feat only achieved by Bobby Jones in 1930 when two of the tournaments were amateur championships.

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David Ferrer has spent much of his career in the shadow of Rafael Nadal, but the 30-year-old joined his absent compatriot in becoming only the second Spaniard to reach the last eight of all four grand slams in a calendar year since the start of the professional era in 1968.

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In the Mobile 1.0 era, companies merely extended things like e-mail and calendar and rudimentary apps to mobile devices, said Nathan.

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Modern-day Mayans say the end of the calendar phase doesn't mean the end of the world -- just the end of an era, and the start of a new one.

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