• "UnixTime" can be used in Interpreter and related constructs, including deployed smart form fields.
• Use of "UnixTime" does not require connectivity to the Wolfram Cloud.

• 1234567 positive integers
  -1234567 negative integers
  1,234,567 integers with separators

• Restricted ["UnixTime" ,{{choices₁,…}}] one among choices
  Restricted ["UnixTime" ,max] a Unix time before max
  Restricted ["UnixTime" ,{min,max}] a Unix time between min and max
  Restricted ["UnixTime" ,{min,max,unit}] a Unix time between min and max, with resolution unit

• The following options can be used:
• DigitBlock Infinity number of digits between breaks
  NumberSeparator {","," "} string to insert at breaks between blocks
  NumberSigns {"-",""} strings to use for signs of negative and positive numbers

• "UnixTime" yields a DateObject with a TimeObject at its second argument.

Basic Examples  (3)