Firebase & Swift -使用UTC -7保存的日期？

import SwiftDate

let localDate = Date() // 获取当前本地日期
let utcMinus7Zone = Region(calendar: Calendar.current, zone: TimeZone(identifier: "America/Los_Angeles")!, locale: Locale.current)
let dateInUTCMinus7 = localDate.toRegion(utcMinus7Zone).toDate()

import Firebase

let db = Firestore.firestore()

let data: [String: Any] = [
    "date": ServerValue.timestamp(from: dateInUTCMinus7)
]

db.collection("your_collection").document("your_document").setData(data) { (error) in
    if let error = error {
        print("Error saving date: \(error)")
    } else {
        print("Date saved successfully!")
    }
}

db.collection("your_collection").document("your_document").getDocument { (snapshot, error) in
    if let error = error {
        print("Error retrieving date: \(error)")
    } else if let snapshot = snapshot, let dateValue = snapshot.get("date") as? Timestamp {
        let utcMinus7Date = dateValue.dateValue().toRegion(utcMinus7Zone)
        let localDate = utcMinus7Date.toRegion(Region.current).toDate()
        print("Date retrieved: \(localDate)")
    }
}