>> Secondly, you should consider storing the times in GMT so you
>> have a reference point, and you should be able to know the
>> location the time was recorded at so you can convert it to local time.
>
> Thank you for your suggestions, you have reinforced what I was considering.
> Thus, I definitely will store GMT and local time,

Just be aware that it will not work correctly
for your clients traveling at high speed to distant stars.

Ivan