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A node.js package for Steven Levithan's excellent dateFormat() function.
Date.prototype.format
method. Sorry folks, but extending native prototypes is for suckers.module.exports = dateFormat;
statement at the bottomN
to get the ISO 8601 numeric representation of the day of the week$ npm install dateformat
$ dateformat --help
As taken from Steven's post, modified to match the Modifications listed above:
var dateFormat = require('dateformat');
var now = new Date();
// Basic usage
dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");
// Saturday, June 9th, 2007, 5:46:21 PM
// You can use one of several named masks
dateFormat(now, "isoDateTime");
// 2007-06-09T17:46:21
// ...Or add your own
dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"';
dateFormat(now, "hammerTime");
// 17:46! Can't touch this!
// When using the standalone dateFormat function,
// you can also provide the date as a string
dateFormat("Jun 9 2007", "fullDate");
// Saturday, June 9, 2007
// Note that if you don't include the mask argument,
// dateFormat.masks.default is used
dateFormat(now);
// Sat Jun 09 2007 17:46:21
// And if you don't include the date argument,
// the current date and time is used
dateFormat();
// Sat Jun 09 2007 17:46:22
// You can also skip the date argument (as long as your mask doesn't
// contain any numbers), in which case the current date/time is used
dateFormat("longTime");
// 5:46:22 PM EST
// And finally, you can convert local time to UTC time. Simply pass in
// true as an additional argument (no argument skipping allowed in this case):
dateFormat(now, "longTime", true);
// 10:46:21 PM UTC
// ...Or add the prefix "UTC:" or "GMT:" to your mask.
dateFormat(now, "UTC:h:MM:ss TT Z");
// 10:46:21 PM UTC
// You can also get the ISO 8601 week of the year:
dateFormat(now, "W");
// 42
// and also get the ISO 8601 numeric representation of the day of the week:
dateFormat(now,"N");
// 6
Mask | Description |
---|---|
d |
Day of the month as digits; no leading zero for single-digit days. |
dd |
Day of the month as digits; leading zero for single-digit days. |
ddd |
Day of the week as a three-letter abbreviation. |
dddd |
Day of the week as its full name. |
m |
Month as digits; no leading zero for single-digit months. |
mm |
Month as digits; leading zero for single-digit months. |
mmm |
Month as a three-letter abbreviation. |
mmmm |
Month as its full name. |
yy |
Year as last two digits; leading zero for years less than 10. |
yyyy |
Year represented by four digits. |
h |
Hours; no leading zero for single-digit hours (12-hour clock). |
hh |
Hours; leading zero for single-digit hours (12-hour clock). |
H |
Hours; no leading zero for single-digit hours (24-hour clock). |
HH |
Hours; leading zero for single-digit hours (24-hour clock). |
M |
Minutes; no leading zero for single-digit minutes. |
MM |
Minutes; leading zero for single-digit minutes. |
N |
ISO 8601 numeric representation of the day of the week. |
o |
GMT/UTC timezone offset, e.g. -0500 or +0230. |
s |
Seconds; no leading zero for single-digit seconds. |
ss |
Seconds; leading zero for single-digit seconds. |
S |
The date's ordinal suffix (st, nd, rd, or th). Works well with d . |
l |
Milliseconds; gives 3 digits. |
L |
Milliseconds; gives 2 digits. |
t |
Lowercase, single-character time marker string: a or p. |
tt |
Lowercase, two-character time marker string: am or pm. |
T |
Uppercase, single-character time marker string: A or P. |
TT |
Uppercase, two-character time marker string: AM or PM. |
W |
ISO 8601 week number of the year, e.g. 42 |
Z |
US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the |
'...' , "..." |
Literal character sequence. Surrounding quotes are removed. |
UTC: |
Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The "UTC:" prefix is removed. |
Name | Mask | Example |
---|---|---|
default |
ddd mmm dd yyyy HH:MM:ss |
Sat Jun 09 2007 17:46:21 |
shortDate |
m/d/yy |
6/9/07 |
mediumDate |
mmm d, yyyy |
Jun 9, 2007 |
longDate |
mmmm d, yyyy |
June 9, 2007 |
fullDate |
dddd, mmmm d, yyyy |
Saturday, June 9, 2007 |
shortTime |
h:MM TT |
5:46 PM |
mediumTime |
h:MM:ss TT |
5:46:21 PM |
longTime |
h:MM:ss TT Z |
5:46:21 PM EST |
isoDate |
yyyy-mm-dd |
2007-06-09 |
isoTime |
HH:MM:ss |
17:46:21 |
isoDateTime |
yyyy-mm-dd'T'HH:MM:ss |
2007-06-09T17:46:21 |
isoUtcDateTime |
UTC:yyyy-mm-dd'T'HH:MM:ss'Z' |
2007-06-09T22:46:21Z |
(c) 2007-2009 Steven Levithan stevenlevithan.com, MIT license.