What day is 9.15? Inventory and in-depth analysis of hot topics across the Internet
September 15th every year seems ordinary, but it is given special significance due to events and anniversaries in different fields. The following is a summary of hotly discussed topics across the Internet in the past 10 days (September 5-15, 2023). It combines historical background and current hot topics to reveal the story behind this day.
1. September 15th in History

| Year | event | heat index |
|---|---|---|
| 1950 | Inchon Landing (Key Battle of the Korean War) | ★★★☆ |
| 2008 | Lehman Brothers goes bankrupt (beginning of the global financial crisis) | ★★★★ |
| 2020 | TikTok US ban deadline | ★★★☆ |
2. Hot topics on September 15, 2023
| Topic classification | Specific content | Social platform popularity |
|---|---|---|
| Technology | iPhone 15 series world premiere (pre-sale on September 15) | Weibo hot search TOP3 |
| entertainment | The scandal of a certain top celebrity continues to ferment | Number one on Douyin’s hot list |
| society | Adjustments to epidemic prevention policies for the opening season of colleges and universities across the country | Zhihu hot discussion |
3. September 15th from an international perspective
1.international day of democracy: The United Nations was established in 2007, and the theme for 2023 is "Challenges to Democracy in the Digital Age." The number of discussions on related topics on Twitter has increased by 40% compared with last year.
2.costa rica independence day: An important holiday in Central America, TikTok related theme videos have been played more than 50 million times.
4. Analysis of hot topics discussed by netizens
| Platform | Hot Topics TOP1 | Participation |
|---|---|---|
| #iPhone15 price exposure# | 230 million reads | |
| Douyin | Dormitory renovation challenges for the first semester of school | 180 million plays |
| Station B | "Genshin Impact" version 4.1 update trailer | Ranked No.2 in the whole site |
5. In-depth content: Why can these topics detonate the Internet?
1.Technology iteration anxiety: The core of the discussion triggered by the iPhone 15 series is not the parameters, but reflects the public’s doubts about the innovation capabilities of technology companies.
2.youth culture phenomenon: The popularity of the topic in colleges and universities is essentially the collision between the post-00s group’s pursuit of personalized lifestyles and the traditional management model.
3.Entertainment till death: The continued popularity of celebrity gossip has exposed the intensification of the information cocoon effect under the algorithm recommendation mechanism.
Conclusion:September 15th is like a prism, reflecting the multi-dimensional characteristics of the times such as technology, culture, and society. In this day of information explosion, we not only see the progress of human civilization, but also face new challenges brought by the digital flood.
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