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
Romanian months Romanian months The traditional Romanian calendar has its own names for the months, which are otherwise identical to those of the Gregorian calendar. In modern Romania and Moldova, the latter exclusively is used for business and government transactions, and predominates in popular use as well. Nevertheless, the traditional names of the months do appear in some contexts, for instance on ecclesiastical calendars produced by the Romanian Orthodox Church. All the names of the months are of Latin origin, which indicates that their use predates the Slavic contact around the 8th century. Six months have their names derived from characteristics of