I made a minor update today in the blue hour calculator. I got a message from a visitor about missing data for the Antarctic region. I thought the best would be to include the research stations. So now if you plan to travel down to the south pole for some good blue hour photographs don't forget to check the best time to do it.
Join to the Blue Hour Flickr Group and add your best images to share it with other fans of the blue hour and night photography on this site.
If you have any ideas, found a bug or just want to say something, contact me using the contact form. Any messages or comments are welcome!