The date to add days to.

The number of days to add (can be negative)

The date to add months to.

The number of months to add (can be negative)

The date to add years to.

The number of years to add (can be negative)

The first date to compare.

The second date to compare.

Date in the month for which the number of days is desired.

Date.

(Optional) Object literal of configuration values:

format {HTML} (Optional)

Any strftime string is supported, such as "%I:%M:%S %p". strftime has several format specifiers defined by the Open group at http://www.opengroup.org/onlinepubs/007908799/xsh/strftime.html PHP added a few of its own, defined at http://www.php.net/strftime

This javascript implementation supports all the PHP specifiers and a few more. The full list is below.

If not specified, it defaults to the ISO 8601 standard date format: %Y-%m-%d. This may be overridden by the deprecated Y.config.dateFormat property.

%a

abbreviated weekday name according to the current locale

%A

full weekday name according to the current locale

%b

abbreviated month name according to the current locale

%B

full month name according to the current locale

%c

preferred date and time representation for the current locale

%C

century number (the year divided by 100 and truncated to an integer, range 00 to 99)

%d

day of the month as a decimal number (range 01 to 31)

%D

same as %m/%d/%y

%e

day of the month as a decimal number, a single digit is preceded by a space (range " 1" to "31")

%F

same as %Y-%m-%d (ISO 8601 date format)

%g

like %G, but without the century

%G

The 4-digit year corresponding to the ISO week number

%h

same as %b

%H

hour as a decimal number using a 24-hour clock (range 00 to 23)

%I

hour as a decimal number using a 12-hour clock (range 01 to 12)

%j

day of the year as a decimal number (range 001 to 366)

%k

hour as a decimal number using a 24-hour clock (range 0 to 23); single digits are preceded by a blank. (See also %H.)

%l

hour as a decimal number using a 12-hour clock (range 1 to 12); single digits are preceded by a blank. (See also %I.)

%m

month as a decimal number (range 01 to 12)

%M

minute as a decimal number

%n

newline character

%p

either "AM" or "PM" according to the given time value, or the corresponding strings for the current locale

%P

like %p, but lower case

%r

time in a.m. and p.m. notation equal to %I:%M:%S %p

%R

time in 24 hour notation equal to %H:%M

%s

number of seconds since the Epoch, ie, since 1970-01-01 00:00:00 UTC

%S

second as a decimal number

%t

tab character

%T

current time, equal to %H:%M:%S

%u

weekday as a decimal number [1,7], with 1 representing Monday

%U

week number of the current year as a decimal number, starting with the first Sunday as the first day of the first week

%V

The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week.

%w

day of the week as a decimal, Sunday being 0

%W

week number of the current year as a decimal number, starting with the first Monday as the first day of the first week

%x

preferred date representation for the current locale without the time

%X

preferred time representation for the current locale without the date

%y

year as a decimal number without a century (range 00 to 99)

%Y

year as a decimal number including the century

%z

numerical time zone representation

%Z

time zone name or abbreviation

%%

a literal "%" character

locale {String} (Deprecated, optional)

Deprecated - use Y.config.lang instead, which provides access to a much larger set of built-in languages. The locale to use when displaying days of week, months of the year, and other locale specific strings. If not specified, this defaults to "en" (though this may be overridden by the deprecated Y.config.locale). The following locales are built in:

en

English

en-US

US English

en-GB

British English

en-AU

Australian English (identical to British English)

More locales may be added by subclassing of the deprecated Y.DataType.Date.Locale["en"]. See Y.DataType.Date.Locale for more information.

The first date to compare.

The second date to compare.

The first date to compare.

The second date to compare.

The date to check

Lower bound of the range.

Higher bound of the range.

Date in the month for which the number of days is desired.

The date corresponding to the month for which a list of dates is required.

Data to convert. Values supported by the Date constructor are supported.