Also referred to as the midnight sun, a polar day occurs when the sun does not set for an entire day, or 24 hours. It is called the midnight sun, because the sun is often still shining at midnight. This phenomenon can occur for just one day or six months, depending on how far away from the equator a region is.
She is Europe's oldest living person and has attributed her longevity to eating several raw eggs a day. The oldest person ever to have lived was the French woman Jeanne Calment who died aged 122 years and 164 days, according to Guinness World Records.
Up until her death on Friday, Ms Bajwa was believed to be the oldest person in the world. According to Guinness World Records, the oldest surviving person is Misao Okawa, from Japan, who is 115 years and 99 days old. Grace Jones, who is 113, is the oldest person in the UK, according to Guinness.