Historical Dates and Firsts

The Symbian source code was first made available on April 3, 2009. This was a significant milestone in the foundation's open source initiative, allowing developers to access the mobile operating system code. The other dates are incorrect.

The entire Symbian^3 platform was made available under open source licenses on February 4, 2010. This completed the foundation's goal of fully open-sourcing the Symbian platform. The other dates are incorrect for this milestone.

Symbian^2 was completed in May 2009. This is a factual question about the timeline of the Symbian mobile operating system's development. The question tests knowledge of mobile OS history and specific release dates.

The RMS Titanic sank on April 14, 1912 (shortly before midnight), with the ship going completely under in the early hours of April 15. The British passenger liner struck an iceberg during its maiden voyage from Southampton to New York City. The other dates listed are incorrect - the disaster did not occur in 1940 or 1942.

The RMS Titanic was ordered on July 31, 1908. This was when the construction contract was signed with Harland and Wolff shipyard in Belfast. The construction began shortly after this order was placed.

The RMS Titanic was launched on May 31, 1911. This was when the hull was completed and the ship was moved out of the drydock into the water. The fitting out process continued after the launch.

Titanic began its commercial service in 1912 with its maiden voyage departing on April 10, 1912. The ship had been completed and sea trials conducted in early 1912 before entering passenger service.

Jana Gana Mana, which later became India's National Anthem, was first sung in 1911 at the Calcutta Session of the Indian National Congress. It was written by Rabindranath Tagore in 1911. India gained independence in 1947 and adopted it as the National Anthem in 1950.

Newton's birth occurred on January 4, 1643, marking the beginning of his remarkable scientific journey. The date discrepancy between options stems from calendar systems, with his birth recorded under the Julian calendar before the Gregorian reform.

Newton's birth date is 4 January 1643 in the Julian calendar. This corresponds to 25 December 1642 in the Gregorian calendar, but the given answer matches the historical record under the Old Style dating system.

Insulin was discovered by Frederick Banting and Charles Best at University of Toronto in 1921-22. Kerosene was developed by Nova Scotia's Abraham Gesner in 1846. The electric cooking range was invented by Ottawa's Thomas Ahearn in 1882. Aspirin (acetylsalicylic acid) was synthesized by German chemist Felix Hoffmann at Bayer in 1897, making it the only non-Canadian invention in the list.

On with the Show! (1929) was the first all-talking, all-color feature film in English-language cinema. Produced by Warner Bros., it pioneered the use of both synchronized sound and Technicolor throughout the entire feature, marking a milestone in film technology.

Johnny Depp was born on June 9, 1963, in Owensboro, Kentucky, USA. This is a well-documented biographical fact about the actor. The other options (Jun 19, Sep 19, May 17) are all incorrect dates.

The first Halloween greeting cards were produced in the early 1900s, particularly between 1900-1910, as the holiday became more commercialized in America. This timing corresponds with the rise of postcard printing and the growing popularity of Halloween as a celebration. The option 'early 1900' represents the correct historical period.