You Are the Sun, I Am the Twilight, Beloved) is an Indian Hindi-language romantic drama television series that premiered on 3 April 2017 on Star Plus.

[6] The series takes place 20 years after the events in Diya Aur Baati Hum and it revolves around the children of Sooraj and Sandhya, mainly focusing on their daughter, Kanak.

Kanak's grandmother, Santosh initially hates her to the core, blaming her to be the reason behind her parents, Sooraj and Sandhya's death.

Kanak's life takes a new turn when Uma Shankar Toshniwal, a rich, kind-hearted but superstitious man and an Ayurveda doctor by profession, forcefully marries her, believing that as a sign from Lord.

Kanak is now self-sufficient and possessing a bitter hatred towards Uma, eventually reappears in his life, who has become a successful business tycoon running the 'K & U' company in the meantime.

It is revealed later on that Uma still loves Kanak and was actually blackmailed and forced into marrying Meera to save his younger cousin Suman from receiving punishment for a murder she had inadvertently committed.

Uma supports her decision, and Aditya then reveal that it was their plan all along to infuse some confidence and passion into Kanak, which she was lacking and also that he had never lost his memory.

[10] Actress Neelu Vaghela playing Santosh revealed the title of the series in February 2017 as Tu Sooraj Main Saanjh, Piyaji.

[12] The series began with a leap of 20 years in its storyline from Diya Aur Baati Hum focusing on Sandhya (Deepika Singh) and Sooraj's (Anas Rashid) children, mainly Kanak (Rhea Sharma) after their death.

[15] Soon, in June 2017, this series among the others was moved to the prime time replacing Saath Nibhana Saathiya as the makers and the channel felt that it could reach a larger audience and also it being a sequel to one of the popular show Diya Aur Baati Hum.

[19] Neelu Vaghela, Ashok Lokhande, Kanika Maheshwari, Urmila Sharma and Rishina Kandhari reprised their roles from Diya Aur Baati Hum.

[20][21][22][23] Rajeev Singh was roped for the role of Vikram Rathi which was played by Karan Goddwani and Gautam Gulati in the former series.

[28] Besides Mayank Arora, Kabeer Kumar, Uday Nene, Sheetal Pandey, Sheefali Singh Soni, Sadiya Siddiqui, Madhura Naik, Mazel Vyas and Swathi Kapoor were cast then.