Lunar calendar average length of the synodic month is days. Thus it is convenient if months generally alternate between 29 and 30 days (sometimes termed respectively “"hollow"” and “"full"”). The distribution of "hollow" and "full" months can be determined using continued fractions, and examining successive approximations for the length of the month in terms of fractions of a day. In the list below, after the number of days listed in the numerator, an integer number of months as listed in the denominator have been completed: These fractions can be used to construct a lunar calendar, or in combination with a solar calendar
Banque Populaire V (Van Peteghem / Lauriot-Prévost) designed this G-Class maxi multihull. The trimaran was built by the shipyard CDK Technologies in Lorient. She was launched at the end of August 2008 in Lorient. In 2009 she made her first attempt across the northern Atlantic from west to east. On Sunday 2 August 2009, she established the new record in 3 days, 15 hours, 25 minutes and 48 seconds (an average speed of 32.94 knots), beating the previous record, held by Franck Cammas on Groupama 3, by more than 12 hours. During the attempt she also broke the 24-hour distance twice, first with