You can use this plugin to set the global default icons to Bootstrap Icons v1. This plugin requires Bootstrap Icons v1 resources to be loaded.

//example picker
const datetimepicker1 = new tempusDominus.TempusDominus(document.getElementById('datetimepicker1'));

//to set globally
tempusDominus.extend(window.tempusDominus.plugins.bi_one.load);
//or
import {load, biOneIcons} from 'tempusDominus/plugins/bi-one'
tempusDominus.extend(load);

// otherwise to set icons to an individual picker
datetimepicker1.updateOptions({ display: icons: window.tempusDominus.plugins.bi_one.biOneIcons});
//or
datetimepicker1.updateOptions({ display: icons: biOneIcons});
    

Boostrap Icons v1 Icons

Boostrap Icons
Option Value
type icons
time bi bi-clock
date bi bi-calendar-week
up bi bi-arrow-up
down bi bi-arrow-down
previous bi bi-chevron-left
next bi bi-chevron-right
today bi bi-calendar-check
clear bi bi-trash
close bi bi-x
Plugins - Bootstrap Icons v1
03/15/2023
03/15/2023
How to use Bootstrap Icons v1 plugin with Tempus Dominus.
datepicker, javascript, open source, tempus dominus, eonasdan