@Override
    public void onEnable() {
        if (this.incompatibleVersion) {
            Logger logger = this.loader.getLogger();
            logger.severe("----------------------------------------------------------------------");
            logger.severe("Your server version is not compatible with this build of LuckPerms. :(");
            logger.severe("");
            logger.severe("If your server is running 1.8, please update to 1.8.8 or higher.");
            logger.severe("If your server is running 1.7.10, please download the Bukkit-Legacy version of LuckPerms from here:");
            logger.severe("==> https://luckperms.net/download");
            logger.severe("----------------------------------------------------------------------");
            getServer().getPluginManager().disablePlugin(this.loader);
            return;
        }

        this.serverStarting = true;
        this.serverStopping = false;
        this.startTime = Instant.now();
        try {
            this.plugin.enable();

            // schedule a task to update the 'serverStarting' flag
            getServer().getScheduler().runTask(this.loader, () -> this.serverStarting = false);
        } finally {
            this.enableLatch.countDown();
        }
    }
The time when the plugin was enabled
bukkit/src/main/java/me/lucko/luckperms/bukkit/LPBukkitBootstrap.java