Lunar calendar traces of its origin in the earlier lunar calendar, which continued to be used alongside it for religious and agricultural purposes. Present-day lunisolar calendars include the Chinese, Hindu, and Thai calendars. Synodic months are 29 or 30 days in length, making a lunar year of 12 months about 11 days shorter than a solar year. Some lunar calendars do not use intercalation, such as most Islamic calendars. For those that do, such as the Hebrew calendar, the most common form of intercalation is to add an additional month every second or third year. Some lunisolar calendars are also calibrated by
Harry Earnshaw seconds. In 1938 Earnshaw won the British Best All-Rounder with the record average speed of 22.627 mph. This was reward for his victory in the Westerley 100-mile competition in a record time of 4 hours 20 minutes 48 seconds, plus two seasons best performances of 50-miles in 2 hours 4 minutes 21 seconds and 249 miles in 12 hours. Harry Earnshaw's achievements were celebrated in 1938 when Cycling Weekly awarded him his own page in the Golden Book of Cycling. In his senior years he became an accomplished after dinner speaker, but later came the sad news of his multiple