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 the day of calendar reform.
d = Date.new(1582,10,15) d.new_start(Date::JULIAN) #=> #<Date: 1582-10-05 ...>
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 ...>
This method is equivalent to d >> n
This method is equivalent to d << n
This method is equivalent to d >> (n * 12)
This method is equivalent to d << (n * 12)
Returns a Time object which denotes self.
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
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 a copy of self as local mode.
Returns a DateTime object which denotes self.
Returns a hash, that will be turned into a JSON object and represent this object.
Stores class name (Time) with number of seconds since epoch and number of microseconds for Time as JSON string