I am using Bootstrap datetimepicker https://eonasdan.github.io/bootstrap-datetimepicker/
As mentioned in the document I was successfully able to change the up, down
In order to change left and right icons you just need to change in the below code:
icons: {
time: 'glyphicon glyphicon-time',
date: 'glyphicon glyphicon-calendar',
up: 'glyphicon glyphicon-chevron-up',
down: 'glyphicon glyphicon-chevron-down',
//previous: 'glyphicon glyphicon-chevron-left',
previous: 'glyphicon glyphicon-backward',
next: 'glyphicon glyphicon-chevron-right',
today: 'glyphicon glyphicon-screenshot',
clear: 'glyphicon glyphicon-trash',
close: 'glyphicon glyphicon-remove'
},
By default the line which i have commented that icon is showing so if u need to change that icon you just simply have to set the path or any icon which you want to show.
You can refer below link: https://eonasdan.github.io/bootstrap-datetimepicker/Options/