The Ethiopian calendar has twelve months of 30 days, followed by a thirteenth month of 5 days, or 6 in leap years. New Year falls on 11 September in the Gregorian calendar, or the 12th in some years. And it runs behind: the Ethiopian Church uses a different calculation of the year of Christ's birth, so the country is about seven to eight years 'behind' the Gregorian calendar. Ethiopia celebrated the year 2000 in September 2007.
That's the estimate from a WHO-led study published in The Lancet in 2024, covering the half-century since the Expanded Programme on Immunization was launched in 1974. It works out to about six lives saved every minute, mostly infants. The measles vaccine alone accounts for around 60% of those lives.
According to the World Gold Council, about 216,000 tonnes of gold have been mined in all of human history. Because gold is so dense (19.3 tonnes per cubic metre), it would fit in a cube about 22 metres on each side, roughly the height of a seven-storey building. Strikingly, about two-thirds of it has been mined since 1950.