Great destinations for some sun are plentiful. Nepal is one of them as you can marvel at the glorious setting sun when it descends from the skies and disappears slowly behind the majestic Himalayan Mountains. It is a sight you not not easily forget.
One suggestion, book a hotel room at Sanagot Mountain Resort. This hotel is situated high on a mountain top and the view is spectacular as it is not blocked by any obstructions in all directions. I shall goggle for its contact number later for you.
If you love the sun, come to sunny Singapore. We have sun whole year round and we are not known as the Garden City for no reason. We have just opened a Garden By The Bay, an enormous garden enclosure of varied plants, flora and fauna, very similar to your Kew Gardens. Our Botanic Gardens need no introduction as it is the second largest, if the the largest outdoor garden in the world.
As for the sun,you can enjoy sunbathing at many of our pristine clean beaches and watch the sunset at your leisure.
Other sunny places? Bali, in Indonesia, Kota Kinabalu in Malaysia, Phuket in Thailand, to name just a few.
Have a happy holiday. about 6 years ago