Is this sentence explaining time difference structured correctly?

> アイダホの時間は日本の時間から１６時間前もってあります。

It's supposed to say that the time in Idaho is 16 hours before the time in
Japan. If it's incorrect, try to help me figure it out without telling me
exactly how to say it.
CC BY-SA 4.0
2017-01-12T17:21:40.610
42477
2021-11-26T19:25:11.703
2021-11-26T19:25:11.703
30454
19385
question
english-to-japanese time
アイダホの時間は日本の時間から１６時間前もってあります
I'm afraid to say it's incorrect. 前もって means _beforehand_ or _in advance_.
This is used when someone does something in preparation for something.

Try using 進んでいる or 遅れている instead.
CC BY-SA 3.0
2017-01-12T23:15:04.260
42479
2017-01-12T23:15:04.260
5010
42477
answer