Prince Philip retired from his royal duties on 2 August 2017, meeting Royal Marines in his final solo public engagement, aged 96. Since 1952 he had completed 22,219 solo engagements. Prime Minister Theresa May thanked him for "a remarkable lifetime of service".
On 6 August 2017, Halimah announced that she would be stepping down as Speaker of Parliament and MP of Marsiling-Yew Tee the next day to run for the presidency in the 2017 presidential election.
After beginning the 2017 season ranked outside the top 200, Kenin steadily rose up the WTA rankings throughout the year while playing exclusively on the professional circuit. She progressed into the top 150 in August after a string of successful results during the summer, including winning an ITF $60K tournament at Stockton and finishing runner-up at the Lexington $60K event. These ITF performances helped her win the US Open Wild Card Challenge for the second straight year.
On August 7, 2017, Netflix acquired Millarworld, the creator-owned publishing company of comic book writer Mark Millar. It is the first ever company acquisition in Netflix's history. Netflix plans to leverage Millar and his current and future work for future original content.
On August 8, 2017, Google fired employee James Damore after he distributed a memo throughout the company which argued that "Google's ideological echo chamber" and bias clouded their thinking about diversity and inclusion, and that it is also biological factors, not discrimination alone, that cause the average woman to be less interested than men in technical positions.
In August, Gaga began the Joanne World Tour. Gaga's creation of Joanne and preparation for her halftime show performance were featured in the documentary Gaga: Five Foot Two, which premiered on Netflix in September. Throughout the film, she was seen suffering from chronic pain, which was later revealed to be the effect of a long-term condition called fibromyalgia. It resulted in Gaga canceling the last ten shows of the Joanne World Tour, which ultimately grossed $95 million from 842,000 tickets sold.
In an interview published on 11 August 2017, Halimah gave her views on the reserved presidential election. She said that it "shows we don't only talk about multiracialism, but we talk about it in the context of meritocracy or opportunities for everyone, and we actually practise it".
In mid-August 2017, Ardern stated that a Labour government would establish a tax working group to explore the possibility of introducing a capital gains tax but ruled out taxing family homes. In response to negative publicity, Ardern abandoned plans to introduce a capital gains tax during the first term of a Labour government.
Jeenbekov resigned from the post of Prime Minister on 21 August 2017, after being named as an official candidate in the 2017 presidential election. He stated that he "wanted to be in an equal position with other presidential candidates."
On 24 August 2017, it was announced that Ibrahimović had signed a new one-year contract with Manchester United. It was also announced that he would be wearing number 10 in his second season with the team.
On 25 August 2017, the ARSA (the Arakan Rohingya Salvation Army) launched a second large-scale attack against 24 police posts and the 552nd Light Infantry Battalion army base in northern Rakhine State. A total of 71 people were reportedly killed in the armed clashes.
During the early hours of 25 August 2017, ARSA (The Arakan Rohingya Salvation Army) insurgents launched coordinated attacks on 24 police posts and the 552nd Light Infantry Battalion army base, killing a dozen people.
On 25 August 2017, Halimah launched her official campaign website, including her campaign slogan "Do Good Do Together", which was criticised by many for being ungrammatical. She defended her slogan, explaining that it is meant to be catchy.
In August 2017, following Trump's warning that North Korea "will be met with fire and fury like the world has never seen" in the event of further threats to the United States, Pelosi said the comments were "recklessly belligerent and demonstrate a grave lack of appreciation for the severity of the North Korean nuclear situation. His saber-rattling and provocative, impulsive rhetoric erode our credibility".
In August, Trump dramatically escalated his rhetoric against North Korea, warning that further provocations against the U.S. would be met with "fire and fury like the world has never seen". In response, North Korean leader Kim Jong-un threatened to direct a missile test toward Guam.
On August 29, 2017, YouTube officially launched the "polymer" redesign of its user interfaces based on Material Design language as its default, as well a redesigned logo that is built around the service's play button emblem.
In September 2017, Nintendo announced a partnership with the Chinese gaming company Tencent to publish a global version of their commercially successful mobile game, Honor of Kings, for the Nintendo Switch. The announcement leads some to believe that Nintendo could soon have a bigger footprint in China, a region where the Switch is not sold and is largely dominated by Tencent.