Day and night at the same time?

Ok so last night I had a dream that I went on an aeroplane - one which would keep doing somersaults and scaring the life outta me (im not a good flier to say the least) and by the time we landed i was so scared i had no idea where we were or anything. then someone told me to look up, and as i did, i was looking upon the most wonderful, tranquil sight.. I was looking out over a beautiful river, supposedly in thailand for some reason. but it was night time on my left hand side, and bright shining daylight on the right. half moon half sun. darkness and light in stark contrast, side by side. can someone, anyone, please tell me what this could mean?