const event = new SHDate('1372-Mordad-05 04:20:30');
event.setMonth(3);
console.log(event.getMonth());
// Expected output: 3
console.log(event.toString());
// Expected output: "Sat 05 Tir 1372 04:20:30 GMT+0430 (Iran Daylight Time)"
// Note: your timezone may vary