I guess the challange is to enter a precise time using a computer, and make it as easy as writing an imprecise time on paper. I don't know where to go from the

I guess the challange is to enter a precise time using a computer, and make it as easy as writing an imprecise time on paper. I don't know where to go from there. On paper, you can assume than a time without a timezone is in localtime. That is fine, since it takes effort to move paper from one timezone to another. If you know the paper is from a different timezone, you might switch your interpretation, even without the timezone stated explicilty.