Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →
instance method
Date#cwday
cwday → integer
ext/date/date_core.c
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static VALUE
d_lite_cwday(VALUE self)
{
get_d1(self);
return INT2FIX(m_cwday(dat));
}
Returns the commercial-date weekday index for self (see Date.commercial); 1 is Monday:
Example
Date.new(2001, 2, 3).cwday # => 6