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VFR Sunrise and Sunset times

Splash One

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1. FSX and FS2004(FS9)

2. FSUIPC 452 and 390 respectively

3. FS Commander and Database Manager 8.5 Net (Build 230309)

4. Aerosoft version

5. Operating System (Vista64 - Installed and Run with Admin Rights !)

I was testing the VFR Sunrise and Sunsett to check times and I have received the following information in both FSX and FS9 modes.

Sunrise : 19/08/2009 9:00:UTC - Sunset: 20/08/2009 7:48: UTC at YMML

According to some simple calculations using the given times, YMML , Melbourne Australia is +10 UTC time which would make Sunrise at 19:00 HRS ? and Sunset at 17:48 HRS on the 20th.

Checking the timeanddate world cock

Sunrise at 6:59 AM in direction 75° East by north East by north

Sunset at 5:49 PM in direction 285° West by north West by north

I think the Sunrise calculation might be incorrect, but the Sunsett is OK?

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Hi Anonymous,

We are not really sure that the calculation is incorrect. In fact, we still believe that it is perfectly correct. If you compare the two attached screenshots, you will notice that the calculation in our program is identical (ignoring the one-minute differecne) to the one of the offcial NOAA Calculator. So I think we are safe.


Sascha & Volker



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Hi VolkerHeine,

I think the main point I wasn't making very clear, appologies for this.

It's the UTC time display that concerns me.

Sunrise : 21/08/2009 8:58:UTC - Sunset: 22/08/2009 7:50: UTC at YMML

Sunrise time converts to 8:58 UTC +10 = 18:58

Sunset time converts to 7:50 UTC = 10 = 17:50


Appologies for rushing and leaving my name out too ..

Best regards


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Hi John,

it's a little bit difficult to explain because I'm using a GERMAN Windows XP version.

Your problem has to do with the internal windows settings.

Please try this:

I'm not sure that I'm using the correct translation because, see above.

Select control panel -> Regions and Language setting adjust -> Time settings

make sure that you set the time to 24 hours = HH:mm:ss and not 12 hours = hh:mm:ss



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Thanks Volker,

This is exatcly the problem.

Working backwords, I had figured that if 8:58 UTC = 20:58 then + 10UTC = 06:58 next Day

But couldn't figure out why it would be doing this.

Would it be worth making a note in the next release that Windows should be in 24Hr time mode?

But maybe this is really just a small thing anyway. :)

Thanks again for your support and fantastic updates.

I have had as much fun making flight plans and exploring FSC, as I do flying :)

Best regards,


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