Since conference and of the Food and Agriculture Organization's publication World Festival of Trees, and a resolution of the United Nations in 1954: " The Conference, recognising the need of arousing mass consciousness of the aesthetic, physical and economic value of trees, recommends a World Festival of Trees to be celebrated annually in each member country on a date suited to local conditions "; it has been adopted by the Netherlands.

Since 1977, New Zealand has celebrated Arbor Day on June 5, which is also World Environment Day, prior to then Arbor Day, in New Zealand, was celebrated on August 4 – which is rather late in the year for tree planting in New Zealand hence the date change.

Since the focus of his book was calculation, Bede gave instructions for computing the date of Easter and the related time of the Easter Full Moon, for calculating the motion of the Sun and Moon through the zodiac, and for many other calculations related to the calendar.

Since April 2007, The Beano has had five revamps to help it keep up to date.

Since 1582, when the Catholic Church adopted the Gregorian calendar while the Eastern Orthodox and most Oriental Orthodox Churches retained the Julian calendar, the date on which Easter is celebrated has again differed.

Since the ecclesiastical new moon falls on a date from 8 March to 5 April inclusive, the paschal full moon ( the 14th of that lunar month ) must fall on a date from 21 March to 18 April inclusive.

Since there are two different calendars currently in use among various Orthodox churches, two dates are listed: the first date is the date on the traditional Julian Calendar, the second date, after the slash, is the same day on the modern Gregorian Calendar:

Since then the university has observed this date in its calendar as Convocation Day.

Since gravitational effects are all around us, it is impossible to pin down the exact date when humans first discovered gravitational mass.

Since that date, several fortified ships have made the journey.

Since a paper describing the algorithm had been published in August 1977, prior to the December 1977 filing date of the patent application, regulations in much of the rest of the world precluded patents elsewhere and only the US patent was granted.

Since this date, the Undertones have performed several tours across the UK, Ireland, Continental Europe and North America.

Since the first term of the original federal officials began on this date and ended 2, 4, or 6 years later, this became the date on which new federal officials took office in subsequent years.

Since these events recur at different intervals, this particular sequence should be unique: the doctors found only one occurrence of this sequence while searching between 1250 and 1115 BC, the 135-year spread around the putative date for the fall of Troy.

Since the date of Easter is calculated differently in the East and West ( see Easter controversy ), in most years the two traditions celebrate Pentecost on different days ( though in some years the celebrations will coincide, as in 2010 and 2011 ).

Since he was a younger son, little attention was paid to him during his youth and his date of birth is therefore unknown.

Since Vaceti is another name for the Vascones, this reference is evidence of Basque ( Gascon ) settlement or control of the islands by that date.

Since he didn't become consul, he most likely died before that date.

Since the date of his birth had never been recorded, he celebrated this day as his " Roman birthday " for the rest of his life.

Since that date there has been no further suggestion of banning the Australian flag from Big Day Out events.

Since the compilation of the Book of Joshua is regarded by textual scholars as late, probably being due to the deuteronomist, it is possible that the tribal allocations given within it date from after this annexation rather than before.

Since the university's establishment in the city in 1837, the histories of the University of Michigan and Ann Arbor have been closely linked.

Since 1998, Harvard University wraps some of the valuable statues on its campus, such as this " Harvard Bixi | Chinese stele ", with waterproof covers every winter, in order to protect them from erosion caused by acid rain.

Since 1998, Harvard University wraps some of the bronze and marble statues on its campus, such as this " Harvard Bixi | Chinese stele ", with waterproof covers every winter, in order to protect them from erosion caused by acid rain ( or, actually, acid snow )

Since 1933, Jacksonville has been the site of the annual Florida vs. Georgia Football Classic, a major college football rivalry game between the University of Florida Gators and the University of Georgia Bulldogs, and since 1946, the city has hosted the Gator Bowl, one of the oldest annual college football bowl games.

From Colony to Superpower: U. S. Foreign Relations Since 1776, Oxford University Press, 2008 ISBN 0-19-976553-7

Since Kourouniotes ’ s excavation, anthropologists and scholars of Arcadian religion have studied the site in terms of its development as a sanctuary, but there was no further systematic or scientific investigation until 1996, when Dr. David Gilman Romano of the University of Pennsylvania conducted a topographical and architectural survey of the site.

Since the construction of the Öresund bridge, Malmö has undergone a major transformation with impressive architectural developments, attracting new biotech and IT companies, and particularly students through Malmö University College.

Since Mars Direct was initially conceived, it has undergone regular review and development by Zubrin himself, the Mars Society, NASA, Stanford University and others.

Since 2004, she has also been Professor of Practice in International Affairs at Columbia University, where she teaches international human rights.

Since the University of Illinois was unhappy with the company's use of the Mosaic name, the company changed its name to Netscape Communications ( thought up by Product Manager Greg Sands ) and named its flagship web browser Netscape Navigator.

Since then, the trunk has been preserved and displayed in the nearby Agricultural University of Athens.

Since 1983 the Presbyterian Youth Triennium has been held every three years at Purdue University in West Lafayette, Indiana, U. S. and is open to Presbyterian high school students throughout the world.

Since 1928 Michigan Technological University in Houghton, Michigan has held an annual Winter Carnival in mid-February, during which a large Snow Sculpture Contest takes place between various clubs, fraternities, and organizations in the community and the university.

Since a very early age, Mazzini showed good learning qualities ( as well as a precocious interest towards politics and literature ), and was admitted to the University at only 14, graduating in law in 1826, initially practicing as a " poor man's lawyer ".

Since 1 September 1939 the German University was subordinated to the Reichsministry of Education in Berlin and on 4 November 1939 it was proclaimed to be Reichsuniversität.

Since 1870, the main University campus has been located on Gilmorehill in the West End of the city.

Since 2002 Smale is a Professor at the Toyota Technological Institute at Chicago ; starting August 1, 2009, he is also a Distinguished University Professor at the City University of Hong Kong.

Since 1980, he has been a member of the Department of Philosophy at the University of Pittsburgh, where he is now Professor Emeritus.

Since 2001, Oxford University Press has financially supported the Clarendon bursary, a University of Oxford graduate scholarship scheme.

Since the 1970s, Ebert has worked for the University of Chicago as a guest lecturer, teaching a night class on film.

Since 1990 he had been Professor Emeritus of Psychiatry at the State University of New York Health Science Center in Syracuse, New York.

Since 2006, improvisational music in many forms has been supported and promoted by ISIM, the International Society for Improvised Music, founded by Ed Sarath of the University of Michigan and Sarah Weaver.