javascript - Fullcalendar Week Title Format -

is possible fullcalendar show week titles single letter? instead of default:

mon tue wed thu fri sat

how can display:

s m t w t f s

i've tried:

$('#calendar').fullcalendar({    header: {    right: '',    center: 'prev, title, next',    left: ''   },   columnformat: {     month: 'd' //also tried 'd' number displayed instead   } )} 

the shortest can 2 letters

$('#calendar').fullcalendar({    header: {    right: '',    center: 'prev, title, next',    left: ''   },   columnformat: {     month: 'dd' //also tried 'd' number displayed instead   } }); 

this library uses moment library , possible formats can found here