jQuery FullCalendar accents in dayView

Question 1

Same problem. I solved by changing the function "htmlEscape" in file fullcalendar.js I add:

.replace(/ì/g, '&igrave;')

the function now work correctly for me (i need the italian language in my application), but you must add the character to correctly encod in the day names

function htmlEscape(s) {
    return (s + '').replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/'/g, '&#039;')
        .replace(/"/g, '&quot;')
        .replace(/ì/g, '&igrave;')
        .replace(/\n/g, '<br />');
}

Question 2

Way simpler: Add <meta charset="utf-8"> to the <head> of your html file

Question 3

I tried the htmlEscape function modified by user3514257 but I found an error.

This is my function:

function htmlEscape(s) {
    return (s + '').replace(/ì/g, '&igrave;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/'/g, '&#039;')
        .replace(/"/g, '&quot;')
        .replace(/&/g, '&amp;')
        .replace(/\n/g, '<br />');
}

I change the first line with the ì line because the & character did not allow recognizing of ì