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
Dump months Dump months The dump months are what the film community calls the two periods of the year when there are lowered commercial and critical expectations for most new releases from American filmmakers and distributors. Domestic audiences during these periods are smaller than the rest of the year, so no tentpole movies are released. January and February are usually most commonly described this way, with August and September sometimes included. Releases during those times primarily include films that would have been released at other times of year had they done better at test screenings, films with less prominent stars, genre films