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 late 1930s alloy steels have been used for frame and fork tubes in higher quality machines.

Since the late 1980s, evidence has become available that instillation of BCG into the bladder is an effective form of immunotherapy in this disease.

Since its introduction at games by the " Roar from 34 ", led by Wild Bill Hagy and others, in the late 1970s, it has been a tradition at Orioles games for fans to yell out the " Oh " in the line " Oh, say does that Star-Spangled Banner yet wave " in " The Star-Spangled Banner ".

Since the late nineteenth century, the South used a colloquial term, the one-drop rule, to classify as black a person of any known African ancestry.

Since the late nineteenth century, only two brief periods of violence have marred its democratic development.

Since there is no evidence that late Maastrichtian nonavian dinosaurs could burrow, swim or dive, they were unable to shelter themselves from the worst parts of any environmental stress that occurred at the K – T boundary.

Since the late 1990s, Orange has also been working in conjunction with singer / songwriter Craig Deanto, and they have released an album titled Who Hears the Cries.

Since 2000Actually the most important are: Cable Onda ( 40 % share ), Cable and Wireless ( started on late 2009 ) and CTV.

Since these geographic considerations imply that, not including the hill within, the walls would be willfully making the city prone to attack from it, some scholars, including the late 19th century surveyors of the Palestine Exploration Fund, consider it unlikely that a wall would ever have been built that would cut the hill off from the city in the valley ; archaeological evidence for the existence of an earlier city wall in such a location has never been found.

Since the late 1990s, custom dog tags have become fashionable amongst musicians ( particularly rappers ), and as a marketing giveaway item.

Since the late 1980s, prominent individuals and organizations have recognized the seminal importance of Engelbart's contributions.

Since the late 1990s, Dublin has experienced a significant level of net immigration, with the greatest numbers coming from the European Union, especially the United Kingdom, Poland and Lithuania.

Since the late 19th century, differential geometry has grown into a field concerned more generally with the geometric structures on differentiable manifolds.

Since then McLean has stated that the lyrics are also somewhat autobiographical and present an abstract story of his life from the mid-1950s until the time he wrote the song in the late 1960s.

Since the late 1980s, the field has been revived in the wake of progress made in the related fields of psycholinguistics, neurolinguistics, evolutionary anthropology, evolutionary psychology, and cognitive science.

Since the late ' 60s, the exploitation of oil increased production and reserves are estimated at 4. 036 million barrels

Since its acquisition of Verant in late 1999, SOE develops, runs, and distributes EverQuest.

Since the late 1990s, almost all release prints have used polyester film stock.

Since the late 1990s, bzip2, a file compression utility based on a block-sorting algorithm, has gained some popularity as a gzip replacement.

Since the late 1970s, towns in the north began industrial production through maquiladoras, especially in San Pedro Sula and Puerto Cortés.

Since the late 1980s, Indonesia has made significant changes to its regulatory framework to encourage economic growth.

* interface to personal computers: Since the late 1990s, most pumps can interface with personal computers for managing and documenting pump programming and / or to upload data from the pump.

Since the late 1990s, the Jamaican government has set an agenda to push the development of technology in Jamaica.

Since the late Middle Ages the Kingdoms of England and Scotland had been evolving towards a quasi-oligarchical or collegiate form of government in which the monarch was held to rule with the consensus of the land-owning upper classes.

Since there was no linguistic contact with France from the late eighteenth century until the twentieth century, Acadian French retained features that died out during the French standardization efforts of the nineteenth century.

Since the eighteenth century casinos have also been located in the town.

Since at least the eighteenth century a military-style uniform has been worn by male Lieutenants ( appropriate to the military origins of the post ).

Since the eighteenth century the Alps have attracted more and more people and fascinated generations of explorers and climbers.

Since the eighteenth century this has been located in the Portinari Chapel.

Since the eighteenth century, they have employed the techniques of textual criticism to reconstruct how the extant manuscripts of the New Testament texts might have descended, and to recover earlier recensions of the texts.

Since the late eighteenth century, the High Renaissance has been taken to refer to a short ( c. 30-year ) period of exceptional artistic production in the Italian states, principally Rome, capital of the Papal States, under Pope Julius II.

Since the early eighteenth century the house has been owned by the Elton family, who were responsible for much building work on the house and many improvements in the town, and although the house itself is now owned by the National Trust, for Victor Cox, and is the oldest purpose-built, continuously operated cinema in the world.

Since the eighteenth amendment to the constitution, Pakistan has been shifted back to the parliamentary democratic republic.

Since the eighteenth century, gold medals have been awarded in the arts, for example, by the Royal Danish Academy, usually as a symbol of an award to give an outstanding student some financial freedom.

Since the Enclosure Acts of the eighteenth century, the UK's uplands ( including Wales and the Scottish Highlands ) have largely been associated with animal husbandry and forestry.

Since the eighteenth century, Barclay historians, noted for their low level in medieval scholarship, have assumed the Scottish family Barclay ( de Berchelai ) is a branch of one of the Anglo-Norman Berkeley family of Berkeley in Gloucestershire.

Since the eighteenth century standing armies have been an integral part of the defense of the majority of more economically developed countries.

Since its abandonment and reutilization as a quarry for the construction of the church of Our Lady of the Assumption in the eighteenth century, its towers and walls were used by villagers as barns and stables.

Since the work of the British Empiricists and Immanuel Kant in the late eighteenth century, Western philosophy has been preoccupied with a fundamental question of epistemology: the question of the relationship between ideas in the human mind and the world existing outside the mind, if in fact such a world exists.

Since writing was practiced in the Aegean before the end of the century, we may hope that the details of tradition will now be occasionally useful.

Since Alexander's work in the field came at the turn of the century, his ideas influenced many originators in the field of mind-body improvement.

Since the 20th century, the appointment of Archbishops of Canterbury conventionally alternates between more moderate Anglo-Catholics and Evangelicals.

Since the early 20th century, the armed forces have pursued the goal of weapons self-sufficiency.

Since then, biochemistry has advanced, especially since the mid-20th century, with the development of new techniques such as chromatography, X-ray diffraction, dual polarisation interferometry, NMR spectroscopy, radioisotopic labeling, electron microscopy, and molecular dynamics simulations.

Since Pope Leo XIII issued the bull Apostolicae Curae in 1896, the Catholic Church has insisted that Anglican orders are invalid because of changes in the Anglican ordination rites of the 16th century and divergence in understanding of the theology of priesthood, episcopacy and Eucharist.

Since the mid-20th century, there has been considerable debate over how the earliest forms of life evolved and how to classify them, especially at the kingdom and domain levels and organisms that are or have been considered bacteria.

Since the early 20th century it has been commonly accepted that Old Irish Bel ( l ) taine is derived from a Common Celtic * belo-te ( p ) niâ, meaning " bright fire " ( where the element * belo-might be cognate with the English word bale in ' bale-fire ' meaning ' white ' or ' shining '; compare Anglo-Saxon bael, and Lithuanian / Latvian baltas / balts, found in the name of the Baltic ; in Slavic languages byelo or beloye also means ' white ', as in Беларусь ( White Russia or Belarus ) or Бе ́ лое мо ́ ре Sea ).

Since Daniel was a statesman during the Persian conquests, the Book of Daniel could have been written in a period when the Persians had their greatest influence on Aramaic, believed to be in the mid 6th century BC.

Since the second half of the 20th century most scholars have agreed with Martin Noth's thesis that the books of Deuteronomy, Joshua, Judges, Samuel and Kings form parts of a single work.

Since the Anglo-Boer war the term " Boervolk " was rarely used in the 20th century by the various regimes because of this attempt to assimilate the Boervolk with the Afrikaners.

Since the second half of the 20th century, computers have been programmed to play chess with increasing success, to the point where home computers can play chess at a very high level.

Since the 12th century, courts have had parallel and co-equal authority to make law -- " legislating from the bench " is a traditional and essential function of courts, which was carried over into the U. S. system as an essential component of the " judicial power " specified by Article III of the U. S. constitution.

Since the consolidation of newspaper comics by the first quarter of the 20th century, most cartoonists have used a group of assistants ( with usually one of them credited ).

Since the 20th century, another source of words has been Japanese using existing kanji ( Chinese characters used in Japanese ).

Since the 16th century, Portugal extensively adopted slavery to man their colonies, coming mainly from West and Central Africa.

Since direct observations of climate are not available before the 19th century, paleoclimates are inferred from proxy variables that include non-biotic evidence such as sediments found in lake beds and ice cores, and biotic evidence such as tree rings and coral.

Since the later 20th century, use of CE and BCE has been popularized in academic and scientific publications, and more generally by publishers emphasizing secularism or sensitivity to non-Christians.

Since the discovery of his " Letter to the Alexandrians " in the last century, much work has been done to rehabilitate Claudius and determine where the truth lies.

Since at least the 3rd century BC, there was influence of northern nomadic peoples and Yemaek peoples on Korean Warfare.

Since the early 21st century within the global functional food industry, raw cranberries have been marketed as a " superfruit " due to their nutrient content and antioxidant qualities.

Since the 19th century, US foreign policy also has been characterized by a shift from the realist school to the idealistic or Wilsonian school of international relations.

Since the Christianization of Ethiopia in the 4th century, the Church of Ethiopia has come under the dominion of the Church of Alexandria.