It depends on the type of novel. In a thriller, there might be a common theme of increasing tension 12 hours after the start. The danger is usually more imminent and the stakes are getting higher.
The theme could be about survival and hope in a post-apocalyptic world. Maybe it focuses on characters trying to rebuild after a great disaster.
Another common theme is the struggle for power within the palace. Characters might be vying for the throne or trying to gain more influence, like in 'The Power Struggle in the Royal Court' fanfiction.
A common theme could be love. Many novels explore different aspects of love, like romantic love, familial love, or self-love.
The so-called day was 24 hours, which was the time it took for the Earth to rotate once. It was also calculated according to the sun's day. It was one day when the Earth rotated to the same position as the sun. However, in terms of the exact length of the Earth's rotation, its cycle was about 23 hours and 56 minutes. At the same time, under different circumstances, the length of sunlight in a day would be different. For example, during the winter solstice, there would be about ten hours of sunlight during the day, and during the summer solstice, there would be about sixteen hours of sunlight during the day. In addition, in some specific concepts, such as the time-limited eating method of intermittent fasting, the time of eating in a day would be limited to a few hours, and the rest of the time would be fasting. However, this did not change the basic definition of 24 hours a day.
No, I don't think it is a common story. I've not come across it frequently in mainstream literature or general storytelling.
Common themes 12 hours after in light novels can include transformation. Characters might change in some way, either in their beliefs or abilities. Also, the theme of urgency can be present. If there was a time limit in the story, 12 hours passing can heighten the sense of urgency, forcing characters to act quickly. Additionally, there could be a theme of connection, where relationships between characters are either solidified or broken within that 12 - hour period.
I think '48 hours novel' is likely an initiative related to writing novels. It might be a competition or just a self - imposed challenge for writers. Given the limited time of 48 hours, the writers would need to be highly organized. They may start with a rough outline, quickly decide on the main characters and their arcs, and then start writing. It would be a race against time to complete the manuscript, and the end result could be quite interesting, perhaps with a unique style due to the rushed nature of the writing process.
I recommend a few novels. " After Love " was a modern romance novel written by Ye Weilan. It was a story about Ji Huaning and Lin Jinglan's love story. They were childhood sweethearts. The beginning was okay, but the end was full of thunder points. The writing was immature, and the description of the relationship between the male and female leads was not deep. The scenes such as the male supporting character being a scumbag and the female supporting character pestering the male protagonist were very shocking. The relationship line between the female protagonist's parents was also very confusing. The main character was bullied and did not fight back. It looked aggrieved. However, Dangdang had free shipping for physical books. 'Two Thousand Years in the World of Immortals' was a Xianxia novel written by Gu Yun Feixiu. Du Heng had transmigrated to Great Zhao and became a posthumous son of the previous dynasty. It was dangerous for his identity to be exposed. Fortunately, he had obtained the Dao Scripture from the Awakening System and could condense his Dao Seed and become the only immortal cultivator. " My Wealth Spreads All Over the Heavens " was a novel written by the cat that spat out rats. There were Gao Yao, Lin Pingzhi, and other characters in it, and the plot revolved around the trade of lifespan. " The Rebirth of a Star Chasing Girl " was a young school novel written by someone who didn't know the way. Yao Xiwei, a 27-year-old star-chaser, found out that her first love had gotten married and was reborn at the age of 17. After her rebirth, she wanted to change her fate. "Douluo: The Martial Soul is the Forged Star Dragon King", a light novel written by Lan Jianye. Luo Chen had transmigrated to the Douluo Continent. His martial soul was the Cast Star Dragon King. He wanted to obtain the Dragon King's inheritance by raising the plane's potential. There were still many other characters that would appear. The novel " Ten Years of Death " is equally exciting. Everyone is welcome to click and read it!