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.
3. Fungal Infection. If your nails have become brittle, are changing color or are becoming thick you may have a fungal infection. You may notice a yellow or brown color around the toenails or a change in the nailâs texture as the keratin is digested by the fungus.