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 1999, the German parliament has again assembled in Berlin in its original Reichstag building, which dates from the 1890s and underwent a significant renovation under the lead of British architect Sir Norman Foster.

Since the 1890s, Thomas Edison owned most of the major American patents relating to motion picture cameras.

Since the solo circumnavigation of Joshua Slocum in the 1890s, long-distance cruising under sail has inspired thousands of otherwise normal people to explore distant seas and horizons.

Since the losses from yellow fever in the Spanish – American War in the 1890s were thirteenfold higher than the losses due to military operations, further experiments were conducted by a team under Walter Reed, composed of doctors James Carroll, Aristides Agramonte, and Jesse William Lazear, that successfully proved the ″ Mosquito Hypothesis ″.

Since the discovery of crude oil in the region during the 1890s, Casper became the regional petroleum industry center.

Since the 1890s historians have vigorously debated the nature of Populism ; most scholars have been liberals who admired the Populists for their attacks on banks and railroads.

Since the 1890s it has been known that changes in blood flow and blood oxygenation in the brain ( collectively known as hemodynamics ) are closely linked to neural activity.

Since the 1890s there has been a large concentration roughly from 10th Street to 5th Street, between 3rd Avenue and Avenue A.

Since its accidental introduction in the 1890s, cheatgrass has radically altered the native shrub ecosystem by replacing indigenous vegetation, and by creating a fire cycle that is too frequent to allow sagebrush to re-establish itself.

Since the re-discovery of the cave in 1881 by explorers, few people ventured more than a few feet ( meters ) into Wind Cave, but it wasn't until the early 1890s, when a 16 year old boy named Alvin McDonald began exploring, that Wind Cave was discovered to extend beyond the original hole.

Since the 1890s only incremental mechanical advances have taken place for the majority of the world's utility bicycles.

Since the 1890s, successive monarchs have employed curators to assist with the management of the collection.

Since the 1890s, the college has fostered social-justice ideals ( as part of the liberal Anglican tradition ) and most students are involved at some point in philanthropic activities.

Since the 1890s the form of the ceremony has remained largely unchanged.

Since Haarlem was quite poor after the siege, this led to many of the chapels and other Catholic churches being abandoned and used for other purposes.

Since the 18th century, Haarlem has historically had more museums per inhabitant than any other city of the Netherlands.

Since Haarlem was no longer a vesting stad or walled city, the tradition of the bells continued, to commemorate the conquest of Damiette on August 25, 1219.

Since many of the families who lived in Amsterdam in those days had country villas, de Wit also painted in houses in the fashionable areas of Haarlem and the Vecht river.

Since 1919 the building is occupied by the historical association Historische vereniging Haerlem, which uses it today for meetings and small public exhibits on the history of Haarlem.

Since the German occupation of World War II, this hospital is no longer run by the Haarlem council, but still exists and is called the Kennemer Gasthuis today.

Since then it is technically no longer a hofje and is managed by a Haarlem house-rental agency.

Since most men of influence in Haarlem at that time were members of the schutterij, the only way for influential men of the Mennonite community to advance themselves socially was through social work and cultural donations.

Since 1861 the question was broadend to include the question where the hondsrug rocks came from, and in 1867 Torell sent in a proposal to declare the rocks were transported by glaciers and was awarded the prize ( a gold medal worth 400 guilders and cash to the amount of 150 guilders ) but he never collected it, to the great frustration of the Haarlem Society's secretary, who sent him letters requesting his manuscript for publication.