Question: What day did they discover the Titanic wreckage?
About the article "Sinking of the RMS Titanic", section "Cultural aftermath and wreckage".

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The 2000 expedition by RMS Titanic Inc. carried out 28 dives during which over 800 artefacts were recovered, including the ship's engine telegraphs, perfume vials and watertight door gears.
In 2001, an American couple – David Leibowitz and Kimberly Miller – caused controversy when they were married aboard a submersible that had set down on the bow of "Titanic", in a deliberate echo of a famous scene from James Cameron's 1997 film.
The wedding was essentially a publicity stunt, sponsored by a British company called SubSea Explorer which had offered a free dive to "Titanic" that Leibowitz had won.
He asked whether his fiancée could come too and was told that she could – but only if she agreed to get married during the trip.
The same company also brought along Philip Littlejohn, the grandson of one of "Titanic"s surviving crew members, who became the first relative of a "Titanic" passenger or crew member to visit the wreck.
Cameron himself also returned to "Titanic" in 2001 to carry out filming for Walt Disney Pictures' "Ghosts of the Abyss", filmed in 3D.
In 2003 and 2004, the US National Oceanic and Atmospheric Administration carried out two expeditions to "Titanic".
The first, carried out between 22 June and 2 July 2003, performed four dives in two days.
Its key aims were to assess the current condition of the wreck site and carry out scientific observations to support ongoing research.
The stern section, which had previously received relatively little attention from explorers, was specifically targeted for analysis.
The microbial colonies aboard "Titanic" were also a key focus of investigation.
The second expedition, from 27 May – 12 June 2004, saw the return of Robert Ballard to "Titanic" nearly 20 years after he discovered it.
The expedition spent 11 days on the wreck, carrying out high-resolution mapping using video and stereoscopic still images.2005 saw two expeditions to the "Titanic".
James Cameron returned to the "Titanic" for the third and last time to film "Last Mysteries of the Titanic", as the "Titanic", and has claimed that this will wrap up "my 10-year odyssey with the "Titanic", and I won't be coming back here", because the "Titanic", having been underwater for 93 years, was showing very severe signs of deterioration in the foremast, the boat deck, the Marconi rooms, and the stern's condition was explained via NOAA, because in his 1995 and 2005 expeditions to the "Titanic", Cameron did not explore the stern of the wreck due to this part of the "Titanic" being in even worse condition than the bow.
It also saw another expedition, "Titanic's Final Moments: Missing Pieces", which began looking for pieces of the "Titanic" never before seen in the debris field.RMS Titanic Inc. mounted further expeditions to "Titanic" in 2004 and 2010, when the first comprehensive map of the entire debris field was produced.
Two autonomous underwater vehicles – torpedo-shaped robots – repeatedly ran backwards and forwards across the debris field, taking sonar scans and over 130,000 high-resolution images.
This enabled a detailed photomosaic of the debris field to be created for the first time, giving scientists a much clearer view of the dynamics of the ship's sinking.
Several hiccups happened during this expedition, as several hurricanes were passing over the wreck site, and the team got the "Remora" ROV caught in a piece of wreckage in the "Titanic"s expansion joint, and carefully had to get the robot out of the expansion joint to avoid damaging the "Titanic", as the "Titanic", having been underwater for 98 years, was in very fragile condition, and one of the AUVs, Ginger, was weighed down by a piece of the lead anchor discovered in 2005.
This same year saw the discovery of the new bacteria living in the rusticles on the "Titanic", "Halomonas titanicae".
Tourist and scientific visits to "Titanic" are still continuing; by April 2012, 100 years since the disaster and nearly 25 since the discovery of the wreck, around 140 people had visited.
On 14 April 2012 (the 100th anniversary of the ship's sinking), the wreck of the "Titanic" became eligible for protection as a UNESCO World Heritage Site, and in the same month, Robert Ballard, the wreck's discoverer, has announced of a plan to preserve the wreck of the "Titanic" by using deep-sea robots to paint the wreck with anti-fouling paint, to help keep the wreck in its current state for all time.
The proposed plan that Ballard announced has been outlined in a documentary made to time with the Titanic's 100th sinking anniversary called "Save the Titanic With Bob Ballard" where Ballard himself talks about how this proposed paint job on the wreck will work.
Ballard says that the reason he has proposed to robotically clean and repaint the "Titanic" with a colour scheme that mimics the rusticles is because when "I visited the "Titanic" in 1986, I saw original anti-fouling paint on the ship's hull which was still working even after 74 years on the seabed". 
Mary died on July 29, 1987 in Syracuse, New York at age 104.
She was the longest-lived "Titanic" survivor, and one of only about 30 that were alive when the "Titanic"s wreckage was discovered in 1985. 
  "A Baltic Tragedy" (1970)  "The Headless Eyes" (1971)  "The Day the Clown Cried" (1972 unedited/unreleased)  "The Great Waldo Pepper" (1975)  "Russian Roulette" (1975)  "Meteor" (1979)  "Raise the Titanic" (1980)  "I Saw What You Did" (1988)  
In the summer of 1985, Ballard was aboard the French research ship "Le Suroît", which was using the side scan sonar "SAR" to search for "Titanic"'s wreck.
When the French ship was recalled, Ballard transferred onto a ship from Woods Hole, the R/V "Knorr".
Unbeknownst to some, this trip was financed by the U.S. Navy for secret reconnaissance of the wreckage of two Navy nuclear powered attack submarines, the USS "Scorpion" and the USS "Thresher", which sank in the 1960s, and not for "Titanic".
Back in 1982, Ballard approached the Navy about his new deep sea underwater robot craft, the "Argo", and his search for "Titanic".
The Navy was not interested in financing the search for the large ocean liner.
However, they were interested in finding out what happened to their missing submarines and ultimately concluded that "Argo" was their best chance to do so.
The Navy agreed it would finance Ballard's "Titanic" search only if he first searched for and investigated the two sunken submarines, and found out the state of their nuclear reactors after being submerged for such a long time, and whether their radioactivity was impacting the environment.
Ballard was placed on temporary active duty in the Navy, in charge of finding and investigating the wrecks.
After the two missions were completed, time and funding permitting, Ballard was free to use resources to hunt for "Titanic".
After their missions for the Navy, "Knorr" arrived on site on August 22, 1985, and deployed "Argo".
When they searched for the two submarines, Ballard and his team discovered that they had imploded from the immense pressure at depth.
That implosion littered thousands of pieces of debris all over the ocean floor.
Following the submarines' large trail of debris led Ballard and his team directly to both of them and made it significantly easier for them to locate the submarines than if they were to search for the hulls directly.
Ballard already knew that "Titanic" imploded from pressure as well, much the same way the two submarines did, and concluded that it too must have also left a scattered debris trail.
Using that lesson, Ballard and his team had "Argo" sweep back and forth across the ocean floor looking for "Titanic's" debris trail.
Ballard's team took shifts monitoring the video feed from "Argo" as it searched the monotonous ocean floor two miles below.
In the early morning hours of September 1, 1985, observers noted anomalies on the otherwise smooth ocean floor.
At first, it was pockmarks, like small craters from impacts.
Eventually, debris was sighted as the rest of the team was awakened.
Finally, a boiler was sighted, and soon after that, the hull was found.
Ballard's team made a general search of the vessel's exterior, noting its condition.
Most significantly, they confirmed that "Titanic" had split in two, and that the stern was in far worse shape than the rest of the ship.
Ballard's team did not have much time to explore, as others were waiting to take "Knorr" on other scientific pursuits, but his fame was now assured.
Ballard originally planned to keep the exact location a secret to prevent anyone from claiming prizes from the wreck.
He considered the site a cemetery, and refused to desecrate it by removing artifacts from the wreck.
On July 12, 1986, Ballard and his team returned on board "Atlantis II" to make the first detailed study of the wreck.
This time, he brought "Alvin", a deep diving submersible that could hold a small crew.
"Alvin" was accompanied by "Jason Junior", a small remotely operated vehicle that could fit through small openings to see into the ship's interior.
Although the first dive (taking over two hours to dive down) encountered technical problems, subsequent dives were far more successful, and produced a detailed photographic record of the wreck's condition. 
In 2008, five Massachusetts scuba divers became the first to reach the steamship, also known as the "Titanic of New England".
The divers spoke about their three successful dives 460 feet below the ocean's surface, relating that they found no human remains, however, they indicated that they did not explore below the deck because of the danger.
Their dives were 10–15 minutes in length, used in exploring the site before returning to the surface.
It was noted that the divers "were unable to retrieve artifacts" due to rules in place at Stellwagen Bank National Marine Sanctuary.