Sure, I'd be happy to help you plan your one-day itinerary in Delhi!

Day 1:

Morning: Start your day with a visit to the iconic Red Fort. This UNESCO World Heritage Site is a must-visit attraction in Delhi and is known for its stunning architecture and rich history. You can take a guided tour of the fort or explore it on your own.

Afternoon: Next, head to Jama Masjid, one of the largest mosques in India. This beautiful mosque was built in the 17th century and is a great place to learn about Islamic culture and architecture. After visiting the mosque, you can enjoy some delicious street food at the nearby Chandni Chowk market.

Evening: In the evening, visit India Gate, a war memorial that honors the Indian soldiers who died in World War I. The monument is beautifully lit up at night and is a popular spot for locals and tourists alike. You can also take a stroll around the nearby Rajpath and enjoy the beautiful views of the city.

Night: End your day with a visit to the Lotus Temple, a stunning temple that is shaped like a lotus flower. The temple is open until 9 pm and is a great place to relax and unwind after a busy day of sightseeing.

I hope this itinerary helps you make the most of your one day in Delhi!