The strength of the sun's ultraviolet (UV) radiation is expressed as a Solar UV Index or Sun Index.The UV Index does not exceed 8 in the UK (8 is rare; 7 may occur on exceptional days, mostly in the ...
Please scroll down to end of page for previous years' dates. Traditionally, the Winter Solstice in China was seen as an important turning point in the year, since days will grow longer from then on ...