return the JSON
value
Deserializes JSON
string by converting numerator value n
, denominator value d
, to a Rational
object.
Returns a hash, that will be turned into a JSON
object and represent this object.
Returns true if the given week date is valid, and false if not.
Date.valid_commercial?(2001,5,6) #=> true Date.valid_commercial?(2001,5,8) #=> false
See also ::jd
and ::commercial
.
Duplicates self and resets its day of calendar reform.
d = Date.new(1582,10,15) d.new_start(Date::JULIAN) #=> #<Date: 1582-10-05 ...>
This method is equivalent to d >> (n * 12).
Date.new(2001,2,3).next_year #=> #<Date: 2002-02-03 ...> Date.new(2008,2,29).next_year #=> #<Date: 2009-02-28 ...> Date.new(2008,2,29).next_year(4) #=> #<Date: 2012-02-29 ...>
See also Date#>>
.
This method is equivalent to d << (n * 12).
Date.new(2001,2,3).prev_year #=> #<Date: 2000-02-03 ...> Date.new(2008,2,29).prev_year #=> #<Date: 2007-02-28 ...> Date.new(2008,2,29).prev_year(4) #=> #<Date: 2004-02-29 ...>
See also Date#<<
.
Returns a Time
object which denotes self. If self is a julian date, convert it to a gregorian date before converting it to Time
.
Returns a DateTime
object which denotes self.
Deserializes JSON
string by converting Julian year y
, month m
, day d
and Day of Calendar Reform sg
to Date
.
Returns a hash, that will be turned into a JSON
object and represent this object.
Stores class name (Date
) with Julian year y
, month m
, day d
and Day of Calendar Reform sg
as JSON
string
Duplicates self and resets its offset.
d = DateTime.new(2001,2,3,4,5,6,'-02:00') #=> #<DateTime: 2001-02-03T04:05:06-02:00 ...> d.new_offset('+09:00') #=> #<DateTime: 2001-02-03T15:05:06+09:00 ...>
Returns a Time
object which denotes self.
Returns self.
Deserializes JSON
string by converting year y
, month m
, day d
, hour H
, minute M
, second S
, offset of
and Day of Calendar Reform sg
to DateTime
.
Returns a hash, that will be turned into a JSON
object and represent this object.
Stores class name (DateTime
) with Julian year y
, month m
, day d
, hour H
, minute M
, second S
, offset of
and Day of Calendar Reform sg
as JSON
string
Returns self.