Today (that is the UTC day, not necessarily your local day) is the first full day of summer. In the latitudes I have been operating in there was snow a couple of weeks before, and it doesn't mean there won't be snow tomorrow, but the sun has set once since it had its moment overhead the Tropic of Cancer, and will remain north of the equator until the equinox in September. Yes, it's odd that we've settled on what is also known as Midsummer's Day as the beginning of summer, but it is pretty close to marking the date of the beginning of warm weather in the northern hemisphere.
As announced earlier, today is also the date SunglassesShop.com is sponsoring a contest in which you can win a pair of SXUC mirrored aviator-style sunglasses, specifically these ones. SunglassesShop.com sells expensive brands, as well, but the website copy makes it clear that SXUC is not an expensive brand, just fun, but they do have UV400 protection. (For work I use expensive sunglasses, but when I'm not working I typically wear sunglasses in about this price so that I won't scream in pain when they get sat on, scratched, or lost. I get my optometrist to verify that they have the advertised UV protection, and he puts them in a machine and tells me they do, even though he's the one who sells me the expensive sunglasses).
After considering various options for the workings of a contest, I've decided that we will play nosewheel roulette. On my next flight, I will mark and photograph a chalk line on the left side of the lowest point of my nosewheel tire during preflight. Then I will taxi, take-off, fly an entire flight and return to parking, at which point I will disembark and re-examine the chalk mark. Your task is to predict how many centimetres clockwise around the circumference of the tire the chalk mark will appear once the airplane is stopped. This may be at the fuel pumps or it may be at the final parking location, wherever I first get an opportunity to photograph and measure it for you.
The total circumference of the tire is 128 centimetres, giving a giant roulette wheel with 128 possibilities, from zero to 127. Post your selection in the comments, then back it up with an e-mail to me with the subject Sunglasses. Your e-mail should contain the same guess, so I don't need to sort out which Anonymous or which David is which, when I need to contact you for your mailing address. You can also save that step and put your mailing address in the e-mail. I won't use it for anything except maybe sending you a postcard sometime, unless you win in which case I will send it to SunglassesShop.com so they can send you your prize. If you live underground and don't need sunglasses, or want to play for glory only, and prefer to cede your prize to the next runner up, you can put that in the e-mail too.
Don't pick a number someone else has chosen, because I'll give priority to the person whose comment appears first. If two guesses are equidistant either side of the correct location, that's okay because there are two pairs of sunglasses available to be won. If there is some added complication I haven't thought of, I'll do my best to be fair.
There will also be a booby prize for the entry furthest from correct. The booby prize is a second-hand (or possibly more) aviation-themed decorative towel in extremely questionable taste. Someone sent it to me and after I looked at it, it went right back into the envelope waiting for its next victim.