Hi,

1 change language on arrive/departure calendar:

- Download the language package of calendar (https://www.dropbox.com/s/qxvjkup5447n1d6/locales.rar?dl=0) and put in folder js 
- Choose the target language according to IETF standard here 
http://data.okfn.org/data/core/language-codes#resource-language-codes to import

For ex: if you want to translate into Russian, please import file bootstrap-datepicker.ru.min.js, right under the line:

<script type="text/javascript" src="js/lib/bootstrap-datepicker.min.js"></script>

Then open file scripts.js, search function datepicker(),

var checkin = $('#date-1').datepicker({

and add option: language: 'xx',

in which 'xx' is the two characters (abbreviation according to IETF standard)

2: make some marks on calendar numbers

=> We do not support this