moment-fridays

FYI

flowing-moments has the exact same functionality as this code, plus additional configuration options (i.e. days other than fridays ;-)

Installation

npm install moment-fridays

API

use as a module..

var fridays = require('moment-fridays')

// > use the defaults:
// fridays('', {}, cb)		

// > specify a date that moment can parse:
// fridays(any_valid_date, cb)		

// > opts are optional,
// > cb can be 2nd or 3rd parameter:
// fridays(Date.now(), opts || {}, cb)	

var opts = { format: 'dddd Do MMM YYYY' }
fridays('2010-12-25', opts, function(err, data) {
  if (err) throw err
  data.pipe(process.stdout)	// streaming data
})

or from the command line..

node index.js --format='dddd Do, MMM YYYY' -l5 '2008-02-29'

//output is:
Friday 29th, Feb 2008
Friday 22nd, Feb 2008
Friday 15th, Feb 2008
Friday 8th, Feb 2008
Friday 1st, Feb 2008

its easy to get the previous four fridays:

node index.js |head -n4

Documentation

see the Moment.js docs for different ways of formatting the date output

(in)accuracy

There is an issue with accuracy when using date.subtract(n, 'days'), which is discussed in this issue. A hardLimit has been implemented here to avoid dates earlier than June 1888, this is NOT the point at which the bug appears, it is just an arbitrary limit because for this use case i am not interested in dates older than this.

License

MIT