27 Time library [time]

27.13 Parsing [time.parse]

Table 102: Meaning of parse flags [tab:time.parse.spec]
Flag
Parsed value
%a
The locale's full or abbreviated case-insensitive weekday name.
%A
Equivalent to %a.
%b
The locale's full or abbreviated case-insensitive month name.
%B
Equivalent to %b.
%c
The locale's date and time representation.
The modified command %Ec interprets the locale's alternate date and time representation.
%C
The century as a decimal number.
The modified command %NC specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %EC interprets the locale's alternative representation of the century.
%d
The day of the month as a decimal number.
The modified command %Nd specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %Od interprets the locale's alternative representation of the day of the month.
%D
Equivalent to %m/%d/%y.
%e
Equivalent to %d and can be modified like %d.
%F
Equivalent to %Y-%m-%d.
If modified with a width N, the width is applied to only %Y.
%g
The last two decimal digits of the ISO week-based year.
The modified command %Ng specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
%G
The ISO week-based year as a decimal number.
The modified command %NG specifies the maximum number of characters to read.
If N is not specified, the default is 4.
Leading zeroes are permitted but not required.
%h
Equivalent to %b.
%H
The hour (24-hour clock) as a decimal number.
The modified command %NH specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %OH interprets the locale's alternative representation.
%I
The hour (12-hour clock) as a decimal number.
The modified command %NI specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %OI interprets the locale's alternative representation.
%j
If the type being parsed is a specialization of duration, a decimal number of days.
Otherwise, the day of the year as a decimal number.
Jan 1 is 1.
In either case, the modified command %Nj specifies the maximum number of characters to read.
If N is not specified, the default is 3.
Leading zeroes are permitted but not required.
%m
The month as a decimal number.
Jan is 1.
The modified command %Nm specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %Om interprets the locale's alternative representation.
%M
The minutes as a decimal number.
The modified command %NM specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %OM interprets the locale's alternative representation.
%n
Matches one whitespace character.
[Note 1:
%n, %t, and a space can be combined to match a wide range of whitespace patterns.
For example, "%n " matches one or more whitespace characters, and "%n%t%t" matches one to three whitespace characters.
— end note]
%p
The locale's equivalent of the AM/PM designations associated with a 12-hour clock.
%r
The locale's 12-hour clock time.
%R
Equivalent to %H:%M.
%S
The seconds as a decimal number.
The modified command %NS specifies the maximum number of characters to read.
If N is not specified, the default is 2 if the input time has a precision convertible to seconds.
Otherwise the default width is determined by the decimal precision of the input and the field is interpreted as a long double in a fixed format.
If encountered, the locale determines the decimal point character.
Leading zeroes are permitted but not required.
The modified command %OS interprets the locale's alternative representation.
%t
Matches zero or one whitespace characters.
%T
Equivalent to %H:%M:%S.
%u
The ISO weekday as a decimal number (1-7), where Monday is 1.
The modified command %Nu specifies the maximum number of characters to read.
If N is not specified, the default is 1.
Leading zeroes are permitted but not required.
%U
The week number of the year as a decimal number.
The first Sunday of the year is the first day of week 01.
Days of the same year prior to that are in week 00.
The modified command %NU specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %OU interprets the locale's alternative representation.
%V
The ISO week-based week number as a decimal number.
The modified command %NV specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
%w
The weekday as a decimal number (0-6), where Sunday is 0.
The modified command %Nw specifies the maximum number of characters to read.
If N is not specified, the default is 1.
Leading zeroes are permitted but not required.
The modified command %Ow interprets the locale's alternative representation.
%W
The week number of the year as a decimal number.
The first Monday of the year is the first day of week 01.
Days of the same year prior to that are in week 00.
The modified command %NW specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified command %OW interprets the locale's alternative representation.
%x
The locale's date representation.
The modified command %Ex interprets the locale's alternate date representation.
%X
The locale's time representation.
The modified command %EX interprets the locale's alternate time representation.
%y
The last two decimal digits of the year.
If the century is not otherwise specified (e.g. with %C), values in the range [69, 99] are presumed to refer to the years 1969 to 1999, and values in the range [00, 68] are presumed to refer to the years 2000 to 2068.
The modified command %Ny specifies the maximum number of characters to read.
If N is not specified, the default is 2.
Leading zeroes are permitted but not required.
The modified commands %Ey and %Oy interpret the locale's alternative representation.
%Y
The year as a decimal number.
The modified command %NY specifies the maximum number of characters to read.
If N is not specified, the default is 4.
Leading zeroes are permitted but not required.
The modified command %EY interprets the locale's alternative representation.
%z
The offset from UTC in the format [+|-]hh[mm].
For example -0430 refers to 4 hours 30 minutes behind UTC, and 04 refers to 4 hours ahead of UTC.
The modified commands %Ez and %Oz parse a : between the hours and minutes and render leading zeroes on the hour field optional: [+|-]h[h][:mm].
For example -04:30 refers to 4 hours 30 minutes behind UTC, and 4 refers to 4 hours ahead of UTC.
%Z
The time zone abbreviation or name.
A single word is parsed.
This word can only contain characters from the basic source character set ([lex.charset]) that are alphanumeric, or one of '_­', '/', '-', or '+'.
%%
A % character is extracted.