kwDate

To install simply use bower:

bower install kwDate

Example usage:

var d = new kwDate();

Return a date flattened to the earliest time of the day:

new kwDate('03/10/2015').normalize(); 
//returns kwDate object that has 0 hours, 0 minutes, 0 seconds, 0 milliseconds

Return a date flattened to the latest time of the day:

d.normalize(true);
//returns kwDate object that has 23 hours, 59 minutes, 59 seconds, 999 milliseconds

Return the number of days between the initial date and the date passed into the daysBetween method:

new kwDate('03/10/2015').daysBetween(’03/15/2015’); //5

Return a date 5 days after the initial date:

new kwDate('03/10/2015').getDateAt(5); 
//returns kwDate object that is set to '03/15/2015'

Return a date 5 days before the initial date:

new kwDate('03/10/2015').getDateAt(-5); 
//returns kwDate object that is set to '03/05/2015'

Easily compare dates:

var d = new kwDate('03/05/2015');
d.isBefore('03/10/2015'); //true
d.isAfter('03/10/2015'); //false
d.isEqual('03/05/2015'); //true
d.compare('03/05/2015'); //0
d.compare('03/10/2015'); //-1
d.compare('03/03/2015'); //1
d.isBetween('03/03/2015', '03/20/2015'); //true