jSpreadsheet plugin Row header rename (Free) :

plugins: [
        {
            name:'rowRename',
            plugin:jss_rowHeaderRename,
            options:{
                headerIndexTitle: "hours",
                rowIndexTitle: function(rowIndex) {
                    return (rowIndex % 24) + ":00";
                },
                widthRowIndex: 80
            }
        }
],

This plugins are the free plugins available on Repo of JSpreadsheet plugins

Download full version Documentation

get started to use this plugin with this CDN :

<script src="https://cdn.jsdelivr.net/gh/GBonnaire/jspreadsheet-plugins-and-editors@latest/plugins/src/rowHeaderRename/index.js"></script>