src/vs/workbench/api/common/extHostTelemetry.ts/isNewAppInstall
export function isNewAppInstall(firstSessionDate: string): boolean {
	const installAge = Date.now() - new Date(firstSessionDate).getTime();
	return isNaN(installAge) ? false : installAge < 1000 * 60 * 60 * 24; // install age is less than a day
}