Time - Instant as a numeric

About

Time such as:

• date
• timestamp
• or time (of the day)

can be represented as a numeric.

For instance:

• julian: the number of days since noon in Greenwich on November 24, 4714 B.C. according to the proleptic Gregorian calendar.
• epoch (Unix Time),
  • at the second level: the number of seconds (or millisecond) from the Epoch (ie January 1, 1970 00:00:00.000 GMT (Gregorian).)
  • at the day level: An incrementing count of days where day 0 is 1970-01-01.

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