The Week and its Seven Days. A year roughly adds up to 52 weeks of seven days, but countries vary on exactly how they count and number the weeks.The seven-day week is the international standard week (ISO 8601) used by the majority of the world.Calendars help keep track of the days. year roughly adds up to 52 weeks of seven days, but countries vary on exactly how they count and number the weeks. The seven-day week is the international standard week (ISO 8601) used by the majority of the world. Calendars help keep track of the days.
Toenails also develop a white appearance due to damage from toenail polish and toenail polish remover. Most nail polish have chemicals, such as formaldehyde and toluene, that dry and damage the toenails. Nail polish remover also has chemicals, such as acetone, that does the same.
When toenail thickening occurs in younger people it is most commonly due to infection or injury. If the thickening is caused by toenail fungus, the nail may turn a yellow or brown color before it begins to thicken. While major trauma to the nail is an obvious cause of thickening, it is more often the result of repetitive pressure on the nail during everyday activities.