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21.1.2 Date conversion specifiers

date conversion specifiers related to dates.

%a

locale's abbreviated weekday name (e.g., ‘Sun’)

%A

locale's full weekday name, variable length (e.g., ‘Sunday’)

%b

locale's abbreviated month name (e.g., ‘Jan’)

%B

locale's full month name, variable length (e.g., ‘January’)

%c

locale's date and time (e.g., ‘Thu Mar  3 23:05:25 2005’)

%C

century. This is like ‘%Y’, except the last two digits are omitted. For example, it is ‘20’ if ‘%Y’ is ‘2000’, and is ‘-0’ if ‘%Y’ is ‘-001’. It is normally at least two characters, but it may be more.

%d

day of month (e.g., ‘01’)

%D

date; same as ‘%m/%d/%y

%e

day of month, space padded; same as ‘%_d

%F

full date in ISO 8601 format; same as ‘%Y-%m-%d’. This is a good choice for a date format, as it is standard and is easy to sort in the usual case where years are in the range 0000…9999. This is a GNU extension.

%g

year corresponding to the ISO week number, but without the century (range ‘00’ through ‘99’). This has the same format and value as ‘%y’, except that if the ISO week number (see ‘%V’) belongs to the previous or next year, that year is used instead. This is a GNU extension.

%G

year corresponding to the ISO week number. This has the same format and value as ‘%Y’, except that if the ISO week number (see ‘%V’) belongs to the previous or next year, that year is used instead. It is normally useful only if ‘%V’ is also used; for example, the format ‘%G-%m-%d’ is probably a mistake, since it combines the ISO week number year with the conventional month and day. This is a GNU extension.

%h

same as ‘%b

%j

day of year (‘001’…‘366’)

%m

month (‘01’…‘12’)

%u

day of week (‘1’…‘7’) with ‘1’ corresponding to Monday

%U

week number of year, with Sunday as the first day of the week (‘00’…‘53’). Days in a new year preceding the first Sunday are in week zero.

%V

ISO week number, that is, the week number of year, with Monday as the first day of the week (‘01’…‘53’). If the week containing January 1 has four or more days in the new year, then it is considered week 1; otherwise, it is week 53 of the previous year, and the next week is week 1. (See the ISO 8601 standard.)

%w

day of week (‘0’…‘6’) with 0 corresponding to Sunday

%W

week number of year, with Monday as first day of week (‘00’…‘53’). Days in a new year preceding the first Monday are in week zero.

%x

locale's date representation (e.g., ‘12/31/99’)

%y

last two digits of year (‘00’…‘99’)

%Y

year. This is normally at least four characters, but it may be more. Year ‘0000’ precedes year ‘0001’, and year ‘-001’ precedes year ‘0000’.


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