Naming days:

day-abbreviation2 ( n -- string )

day-abbreviations2 ( -- value )

day-abbreviation3 ( n -- string )

day-abbreviations3 ( -- value )

day-name ( obj -- string )

day-names ( -- value )

Calculating a Julian day number:

julian-day-number ( year month day -- n )

Calculate a timestamp:

julian-day-number>date ( n -- year month day )