A blood blister forms when skin and small blood vessels are damaged without breaking the skin. Trapped beneath the skin surface is some blood and skin fluid. Blood blisters are commonly caused by accidents in which the skin is pinched by a tool or a heavy weight, or they may occur from constant rubbing back and forth.
1 Sunshine hours in Chicago, Illinois range between 3:42 per day in December & 10:14 for each day in July. 2  The longest day of the year is 15:02 long and the shortest day is 8:57 long.  The longest day is 6:04 longer than the shortest day.
4:23 pm. 9 hr 7 min. Notice that in Chicago, thereâs more than a six hour variation of daylight hours from the longest to the shortest day of the year. For Honolulu, thereâs less than a three hour difference from the longest to the shortest day of the year. I should also mention that Hawaii doesnât observe daylight savings time, but Chicago does. So, when trying to make apples-to-apples comparison of sunrise and sunset times, add an hour to the June times.