async loadTimezonesFiles() {
		this.sFileContent = await fs.readFile(sTimezonesPath, "utf8");
		this.sUtilsFileContent = await fs.readFile(sTimezoneUtilsPath, "utf8");
		await this.loadBCP47Timezones();
	}
Loads the _timezones.js and the TimezoneUtils.js files.