DateTime

Create a new DateTime object corresponding to the specified Civil Date and hour h, minute min, second s.

The 24-hour clock is used. Negative values of h, min, and sec are treating as counting backwards from the end of the next larger unit (e.g. a min of -2 is treated as 58). No wraparound is performed. If an invalid time portion is specified, an ArgumentError is raised.

of is the offset from UTC as a fraction of a day (defaults to 0). sg specifies the Day of Calendar Reform.

y defaults to -4712, m to 1, and d to 1; this is Julian Day Number day 0. The time values default to 0.

 
               # File date.rb, line 1606
def self.civil(y=-4712, m=1, d=1, h=0, min=0, s=0, of=0, sg=ITALY)
  unless (jd = _valid_civil?(y, m, d, sg)) &&
         (fr = _valid_time?(h, min, s))
    raise ArgumentError, 'invalid date'
  end
  if String === of
    of = Rational(zone_to_diff(of) || 0, 86400)
  end
  new!(jd_to_ajd(jd, fr, of), of, sg)
end
            

Create a new DateTime object corresponding to the specified Commercial Date and hour h, minute min, second s.

The 24-hour clock is used. Negative values of h, min, and sec are treating as counting backwards from the end of the next larger unit (e.g. a min of -2 is treated as 58). No wraparound is performed. If an invalid time portion is specified, an ArgumentError is raised.

of is the offset from UTC as a fraction of a day (defaults to 0). sg specifies the Day of Calendar Reform.

y defaults to -4712, w to 1, and d to 1; this is Julian Day Number day 0. The time values default to 0.

 
               # File date.rb, line 1634
def self.commercial(y=-4712, w=1, d=1, h=0, min=0, s=0, of=0, sg=ITALY)
  unless (jd = _valid_commercial?(y, w, d, sg)) &&
         (fr = _valid_time?(h, min, s))
    raise ArgumentError, 'invalid date'
  end
  if String === of
    of = Rational(zone_to_diff(of) || 0, 86400)
  end
  new!(jd_to_ajd(jd, fr, of), of, sg)
end
            

Create a new DateTime object corresponding to the specified Julian Day Number jd and hour h, minute min, second s.

The 24-hour clock is used. Negative values of h, min, and sec are treating as counting backwards from the end of the next larger unit (e.g. a min of -2 is treated as 58). No wraparound is performed. If an invalid time portion is specified, an ArgumentError is raised.

of is the offset from UTC as a fraction of a day (defaults to 0). sg specifies the Day of Calendar Reform.

All day/time values default to 0.

 
               # File date.rb, line 1556
def self.jd(jd=0, h=0, min=0, s=0, of=0, sg=ITALY)
  unless (jd = _valid_jd?(jd, sg)) &&
         (fr = _valid_time?(h, min, s))
    raise ArgumentError, 'invalid date'
  end
  if String === of
    of = Rational(zone_to_diff(of) || 0, 86400)
  end
  new!(jd_to_ajd(jd, fr, of), of, sg)
end
            

Create a new DateTime object representing the current time.

sg specifies the Day of Calendar Reform.

 
               # File date.rb, line 1804
def self.now(sg=ITALY)
  t = Time.now
  jd = civil_to_jd(t.year, t.mon, t.mday, sg)
  fr = time_to_day_fraction(t.hour, t.min, [t.sec, 59].min) +
    Rational(t.nsec, 86400_000_000_000)
  of = Rational(t.utc_offset, 86400)
  new!(jd_to_ajd(jd, fr, of), of, sg)
end
            

Create a new DateTime object corresponding to the specified Ordinal Date and hour h, minute min, second s.

The 24-hour clock is used. Negative values of h, min, and sec are treating as counting backwards from the end of the next larger unit (e.g. a min of -2 is treated as 58). No wraparound is performed. If an invalid time portion is specified, an ArgumentError is raised.

of is the offset from UTC as a fraction of a day (defaults to 0). sg specifies the Day of Calendar Reform.

y defaults to -4712, and d to 1; this is Julian Day Number day 0. The time values default to 0.

 
               # File date.rb, line 1581
def self.ordinal(y=-4712, d=1, h=0, min=0, s=0, of=0, sg=ITALY)
  unless (jd = _valid_ordinal?(y, d, sg)) &&
         (fr = _valid_time?(h, min, s))
    raise ArgumentError, 'invalid date'
  end
  if String === of
    of = Rational(zone_to_diff(of) || 0, 86400)
  end
  new!(jd_to_ajd(jd, fr, of), of, sg)
end
            

Create a new DateTime object by parsing from a String, without specifying the format.

str is a String holding a date-time representation. comp specifies whether to interpret 2-digit years as 19XX (>= 69) or 20XX (< 69); the default is not to. The method will attempt to parse a date-time from the String using various heuristics; see #_parse in date/format.rb for more details. If parsing fails, an ArgumentError will be raised.

The default str is '-4712-01-01T00:00:00+00:00'; this is Julian Day Number day 0.

sg specifies the Day of Calendar Reform.

 
               # File date.rb, line 1719
def self.parse(str='-4712-01-01T00:00:00+00:00', comp=true, sg=ITALY)
  elem = _parse(str, comp)
  new_by_frags(elem, sg)
end
            

Create a new DateTime object by parsing from a String according to a specified format.

str is a String holding a date-time representation. fmt is the format that the date-time is in. See date/format.rb for details on supported formats.

The default str is '-4712-01-01T00:00:00+00:00', and the default fmt is '%FT%T%z'. This gives midnight on Julian Day Number day 0.

sg specifies the Day of Calendar Reform.

An ArgumentError will be raised if str cannot be parsed.

 
               # File date.rb, line 1699
def self.strptime(str='-4712-01-01T00:00:00+00:00', fmt='%FT%T%z', sg=ITALY)
  elem = _strptime(str, fmt)
  new_by_frags(elem, sg)
end