Enum Format

pub enum Format {
    A,
    BCD,
    X,
    Custom(String),
}

Format

“a” format

Four newline-separated timestamps with the epoch time in fractional seconds, RFC 3339 format / UTC, default format / UTC, and default format / local

%s.%f
%Y-%m-%dT%H:%M:%SZ
%a %d %b %Y %H:%M:%S %Z # UTC
%a %d %b %Y %H:%M:%S %Z # Specified or local timezone

“x” format

Novel UTC / base 60 encoding

0* 0 1 2 3 4 5 6 7 8 9
1* A B C D E F G H I J
2* K L M N O P Q R S T
3* U V W X Y Z a b c d
4* e f g h i j k l m n
5* o p q r s t u v w x

Field	Values	Result
Year	2020 => 33*60+40	Xe
Month	Jan-Dec => 0-11	0-B
Day	0-27/28/29/30	0-R/S/T/U
Hour	0-23	0-N
Minute	0-59	0-x
Second	0-59	0-x

See also Dtg::from_x

Custom format

See also Dtg::format

Date specifiers

Spec.	Example	Description
%Y	2001	The full proleptic Gregorian year, zero-padded to 4 digits.
%C	20	The proleptic Gregorian year divided by 100, zero-padded to 2 digits.
%y	01	The proleptic Gregorian year modulo 100, zero-padded to 2 digits.
%m	07	Month number (01–12), zero-padded to 2 digits.
%b	Jul	Abbreviated month name. Always 3 letters.
%B	July	Full month name. Also accepts corresponding abbreviation in parsing.
%h	Jul	Same as %b.
%d	08	Day number (01–31), zero-padded to 2 digits.
%e	8	Same as %d but space-padded. Same as %_d.
%a	Sun	Abbreviated weekday name. Always 3 letters.
%A	Sunday	Full weekday name. Also accepts corresponding abbreviation in parsing.
%w	0	Sunday = 0, Monday = 1, …, Saturday = 6.
%u	7	Monday = 1, Tuesday = 2, …, Sunday = 7. (ISO 8601)
%U	28	Week number starting with Sunday (00–53), zero-padded to 2 digits.
%W	27	Same as %U, but week 1 starts with the first Monday in that year instead.
%G	2001	Same as %Y but uses the year number in ISO 8601 week date.
%g	01	Same as %y but uses the year number in ISO 8601 week date.
%V	27	Same as %U but uses the week number in ISO 8601 week date (01–53).
%j	189	Day of the year (001–366), zero-padded to 3 digits.
%D	07/08/01	Month-day-year format. Same as %m/%d/%y.
%x	07/08/01	Locale’s date representation (e.g., 12/31/99).
%F	2001-07-08	Year-month-day format (ISO 8601). Same as %Y-%m-%d.
%v	8-Jul-2001	Day-month-year format. Same as %e-%b-%Y.

Time specifiers

Spec.	Example	Description
%H	00	Hour number (00–23), zero-padded to 2 digits.
%k	0	Same as %H but space-padded. Same as %_H.
%I	12	Hour number in 12-hour clocks (01–12), zero-padded to 2 digits.
%l	12	Same as %I but space-padded. Same as %_I.
%P	am	am or pm in 12-hour clocks.
%p	AM	AM or PM in 12-hour clocks.
%M	34	Minute number (00–59), zero-padded to 2 digits.
%S	60	Second number (00–60), zero-padded to 2 digits.
%f	026490000	The fractional seconds (in nanoseconds) since last whole second.
%.f	.026490	Similar to .%f but left-aligned. These all consume the leading dot.
%.3f	.026	Similar to .%f but left-aligned but fixed to a length of 3.
%.6f	.026490	Similar to .%f but left-aligned but fixed to a length of 6.
%.9f	.026490000	Similar to .%f but left-aligned but fixed to a length of 9.
%3f	026	Similar to %.3f but without the leading dot.
%6f	026490	Similar to %.6f but without the leading dot.
%9f	026490000	Similar to %.9f but without the leading dot.
%R	00:34	Hour-minute format. Same as %H:%M.
%T	00:34:60	Hour-minute-second format. Same as %H:%M:%S.
%X	00:34:60	Locale’s time representation (e.g., 23:13:48).
%r	12:34:60 AM	Hour-minute-second format in 12-hour clocks. Same as %I:%M:%S %p.

Time zone specifiers

Spec.	Example	Description
%Z	ACST	Local time zone name. Skips all non-whitespace characters during parsing.
%z	+0930	Offset from the local time to UTC (with UTC being +0000).
%:z	+09:30	Same as %z but with a colon.
%#z	+09	Parsing only: Same as %z but allows minutes to be missing or present.

Date & time specifiers

Spec.	Example	Description
%c	Sun Jul 8 00:34:60 2001	Locale’s date and time (e.g., Thu Mar 3 23:05:25 2005).
%+	2001-07-08T00:34:60.026490+09:30	ISO 8601 / RFC 3339 date & time format.
%s	994518299	UNIX timestamp, the number of seconds since 1970-01-01 00:00 UTC.

Special specifiers

Spec.	Description
%t	Literal tab (\t).
%n	Literal newline (\n).
%%	Literal percent sign.

Variants

A

BCD

X

Custom(String)

Implementations

impl Format

pub fn new() -> Format

Create a default Format

pub fn rfc_3339() -> Format

Create an RFC 3339 Format

pub fn custom(s: &str) -> Format

Create a custom Format

Trait Implementations

impl Clone for Format

fn clone(&self) -> Format

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for Format

fn default() -> Format

Returns the “default value” for a type.