Winter solstice one must be able to observe a change in azimuth or elevation less than or equal to about 1/60 of the angular diameter of the sun. Observing that it occurred within a two-day period is easier, requiring an observation precision of only about 1/16 of the angular diameter of the sun. Thus, many observations are of the day of the solstice rather than the instant. This is often done by observing the sunrise and sunset or using an astronomically aligned instrument that allows a ray of light to be cast on a certain point around that time. Length of day
Turkish months Gregorian calendar dates were in use since March 1917. The names of the months from February to September had been used in the now abandoned Rumi calendar, with the other four still retaining their old Arabic/Aramaic names. In 1945, these four received names of Turkish origin. Turkish months The month names in Turkish are derived from three languages: either from Latin, Levantine Arabic (which itself took its names from Hebrew and Aramaic), or from a genuine Turkish word. The Arabic-Hebrew-Aramaic month names themselves originate in the ancient Babylonian calendar, and are therefore akin to the names of months in the