Method: Date#start

Defined in:
date_core.c

#start ⇒ Float

Returns the Julian start date for calendar reform; if not an infinity, the returned value is suitable for passing to Date#jd:

d = Date.new(2001, 2, 3, Date::ITALY)
s = d.start     # => 2299161.0
Date.jd(s).to_s # => "1582-10-15"

d = Date.new(2001, 2, 3, Date::ENGLAND)
s = d.start     # => 2361222.0
Date.jd(s).to_s # => "1752-09-14"

Date.new(2001, 2, 3, Date::GREGORIAN).start # => -Infinity
Date.new(2001, 2, 3, Date::JULIAN).start    # => Infinity

See argument start.

Returns:

  • (Float) 


5751
5752
5753
5754
5755
5756
 
# File 'date_core.c', line 5751

static VALUE
d_lite_start(VALUE self)
{
    get_d1(self);
    return DBL2NUM(m_sg(dat));
}