HarmonyOS 如何判断当前时区是否执行夏令时

getDaylight(year: number): boolean { 
  let d1 = new Date(year, 0, 1); 
  let d2 = new Date(year, 6, 1); 
  if (d1.getTimezoneOffset() != d2.getTimezoneOffset()) { 
    console.log('Daylight Saving Time'); //夏令时 
    return true 
  } 
  else { 
    console.log('Daylight Time'); //非夏令时 
    return false 
  } 
}
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