strftime for JavaScript. Works in (at least) node.js and browsers. Supports localization and timezones. Most standard specifiers from C are supported as well as some other extensions from Ruby.
node:
npm install strftime
bower install strftime
component install samsonjs/strftime
yarn:
yarn add strftime
Or you can copy strftime.js wherever you want to use it, whether that's with a <script> tag or require or anything else.
var strftime = require('strftime') // not required in browsers
console.log(strftime('%B %d, %Y %H:%M:%S')) // => April 28, 2011 18:21:08
console.log(strftime('%F %T', new Date(1307472705067))) // => 2011-06-07 18:51:45If you want to localize it:
var strftime = require('strftime') // not required in browsers
var it_IT = {
days: ['domenica', 'lunedi', 'martedi', 'mercoledi', 'giovedi', 'venerdi', 'sabato'],
shortDays: ['dom', 'lun', 'mar', 'mer', 'gio', 'ven', 'sab'],
months: ['gennaio', 'febbraio', 'marzo', 'aprile', 'maggio', 'giugno', 'luglio', 'agosto', 'settembre', 'ottobre', 'novembre', 'dicembre'],
shortMonths: ['gen', 'feb', 'mar', 'apr', 'mag', 'giu', 'lug', 'ago', 'set', 'ott', 'nov', 'dic'],
AM: 'AM',
PM: 'PM',
am: 'am',
pm: 'pm',
formats: {
D: '%m/%d/%y',
F: '%Y-%m-%d',
R: '%H:%M',
X: '%T',
c: '%a %b %d %X %Y',
r: '%I:%M:%S %p',
T: '%H:%M:%S',
v: '%e-%b-%Y',
x: '%D'
}
}
var strftimeIT = strftime.localize(it_IT)
console.log(strftimeIT('%B %d, %Y %H:%M:%S')) // => aprile 28, 2011 18:21:08
console.log(strftimeIT('%B %d, %Y %H:%M:%S', new Date(1307472705067))) // => giugno 7, 2011 18:51:45Some locales are bundled and can be used like so:
var strftime = require('strftime') // not required in browsers
var strftimeIT = strftime.localizeByIdentifier('it_IT')
console.log(strftimeIT('%B %d, %Y %H:%M:%S')) // => aprile 28, 2011 18:21:08
console.log(strftimeIT('%B %d, %Y %H:%M:%S', new Date(1307472705067))) // => giugno 7, 2011 18:51:45The full list of bundled locales is below.
Time zones can be passed in as an offset from GMT in minutes.
var strftime = require('strftime') // not required in browsers
var strftimePDT = strftime.timezone(-420)
var strftimeCEST = strftime.timezone(120)
console.log(strftimePDT('%B %d, %y %H:%M:%S', new Date(1307472705067))) // => June 07, 11 11:51:45
console.log(strftimeCEST('%F %T', new Date(1307472705067))) // => 2011-06-07 20:51:45Alternatively you can use the timezone format used by ISO 8601, +HHMM or -HHMM.
var strftime = require('strftime') // not required in browsers
var strftimePDT = strftime.timezone('-0700')
var strftimeCEST = strftime.timezone('+0200')
console.log(strftimePDT('%F %T', new Date(1307472705067))) // => 2011-06-07 11:51:45
console.log(strftimeCEST('%F %T', new Date(1307472705067))) // => 2011-06-07 20:51:45Extensions from Ruby are noted in the following list.
Unsupported specifiers are rendered without the percent sign.
e.g. %q becomes q. Use %% to get a literal % sign.
- A: full weekday name
- a: abbreviated weekday name
- B: full month name
- b: abbreviated month name
- C: AD century (year / 100), padded to 2 digits
- c: equivalent to
%a %b %d %X %Y %Zin en_US (based on locale) - D: equivalent to
%m/%d/%yin en_US (based on locale) - d: day of the month, padded to 2 digits (01-31)
- e: day of the month, padded with a leading space for single digit values (1-31)
- F: equivalent to
%Y-%m-%din en_US (based on locale) - H: the hour (24-hour clock), padded to 2 digits (00-23)
- h: the same as %b (abbreviated month name)
- I: the hour (12-hour clock), padded to 2 digits (01-12)
- j: day of the year, padded to 3 digits (001-366)
- k: the hour (24-hour clock), padded with a leading space for single digit values (0-23)
- L: the milliseconds, padded to 3 digits [Ruby extension]
- l: the hour (12-hour clock), padded with a leading space for single digit values (1-12)
- M: the minute, padded to 2 digits (00-59)
- m: the month, padded to 2 digits (01-12)
- n: newline character
- o: day of the month as an ordinal (without padding), e.g. 1st, 2nd, 3rd, 4th, ...
- P: "am" or "pm" in lowercase (Ruby extension, based on locale)
- p: "AM" or "PM" (based on locale)
- R: equivalent to
%H:%Min en_US (based on locale) - r: equivalent to
%I:%M:%S %pin en_US (based on locale) - S: the second, padded to 2 digits (00-60)
- s: the number of seconds since the Epoch, UTC
- T: equivalent to
%H:%M:%Sin en_US (based on locale) - t: tab character
- U: week number of the year, Sunday as the first day of the week, padded to 2 digits (00-53)
- u: the weekday, Monday as the first day of the week (1-7)
- v: equivalent to
%e-%b-%Yin en_US (based on locale) - W: week number of the year, Monday as the first day of the week, padded to 2 digits (00-53)
- w: the weekday, Sunday as the first day of the week (0-6)
- X: equivalent to
%Din en_US (based on locale) - x: equivalent to
%Tin en_US (based on locale) - Y: the year with the century
- y: the year without the century (00-99)
- Z: the time zone name, replaced with an empty string if it is not found
- z: the time zone offset from UTC, with a leading plus sign for UTC and zones east of UTC and a minus sign for those west of UTC, hours and minutes follow each padded to 2 digits and with no delimiter between them
For more detail see man 3 strftime as the format specifiers should behave identically. If behaviour differs please file a bug.
Any specifier can be modified with -, _, 0, or : as well, as in Ruby. Using %- will omit any leading zeroes or spaces, %_ will force spaces for padding instead of the default, and %0 will force zeroes for padding. There's some redundancy here as %-d and %e have the same result, but it solves some awkwardness with formats like %l. Using %: for time zone offset, as in %:z will insert a colon as a delimiter.
- de_DE
- en_CA
- en_US
- es_MX
- fr_FR
- it_IT
- nl_NL
- pt_BR
- ru_RU
- tr_TR
- zh_CN
- Alexandr Nikitin
- Andrew Pirondini of iFixit
- Andrew Schaaf
- Ayman Nedjmeddine
- Cory Heslip
- Forbes Lindesay
- John Zwinck
- Joost Hietbrink
- Kevin Jin
- Michael J.
- Peter deHaan
- Rob Colburn
- Ryan Regalado
- Ryan Stafford
- Sami Samhuri
- Stian Grytøyr
- TJ Holowaychuk
- w0den
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