Hello, Welcome here

Date picker default

The basic setup requires targetting an input element and invoking the picker: $('.datepicker').pickadate()

Date picker default - String sort

Change the month and weekday labels as you find suitable: weekdaysShort: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
showMonthsShort: true

Date picker default - Change button text

Change the text or hide a button completely by passing a falsy value:
today: '',
clear: 'Clear selection',
close: 'Cancel'

Date picker default - Change button text

Change the title attributes to several elements within the picker:
labelMonthNext: 'Go to the next month',
labelMonthPrev: 'Go to the previous month',
labelMonthSelect: 'Pick a month from the dropdown',
labelYearSelect: 'Pick a year from the dropdown',
selectMonths: true, selectYears: true

Date picker default - translation

The picker can be extended to add support for internationalization. Translations for over 40 languages are available out of the box, which you can include in one of two ways:
monthsFull: ['Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin', 'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre'],
weekdaysShort: ['Dim', 'Lun', 'Mar', 'Mer', 'Jeu', 'Ven', 'Sam'],
today: 'aujourd\'hui',
clear: 'effacer'

Date picker default - fomats

Display a human-friendly format and use an alternate one to submit to the server.
format: 'You selecte!d: dddd, dd mmm, yyyy',
formatSubmit: 'yyyy/mm/dd'

Date picker default - pre-filled values

<input data-value="2015/04/20">

Date picker default - editable input

editable: true

Date picker default - select options

selectYears: true, selectMonths: true

Date picker default - select year

You can also specify the number of years to show in the dropdown using an even integer - half before and half after the year in focus: selectYears: 4

Date picker default - date limits

Using javascript dates :
min: new Date(2015,3,20), max: new Date(2015,7,14)
or using arrays
min: [2015,3,20], max: [2015,7,14]