06 May 10 08:00, Roger Nelson wrote to Roy Witt:

 RW>> You shouldn't believe everything that you read nor anything that
 RW>> implies a specific date. (such as creation) I consider the Hebrew
 RW>> calendar the oldest calendar in use that reflects with a certain
 RW>> accuracy the 7 days of the week since they have been keeping a
 RW>> calendar (5000+ years). The late calendar comers were too far off to
 RW>> make their calendars unreliable for events that happened before 1500
 RW>> AD.

 RN> What about the atomic clock?

Is not a calendar, it's the US civilian time standard, which currently
keeps time to within 1 second in about 100 million years. Its accuracy has
been superceded by a newer, smaller aluminum ion clock that is said to not
gain or lose one second in 3.7 billion years.

An even more accurate clock is being built that is based on stellar time.

                R\%/itt

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