From the petal arrangement, position on twig, colour of flower and leaf looks like Michelia champaca, family Magnoliaceae. Also called Sonar ( golden ) Champa in Bengali, I think. It is a very fragnant flower.
In Lonicera japonica, Japanese Honeysuckle, as seen in pic in link below, 4 petals ( or maybe one large one ) are pointing upwards and a single, thin one pointing downwards. Also the colour seems white, only dried ones get a creamish gold colour.
I also feel the Champa is more commonly seen here in India. Did the flower in pic IMG_0040.JPG have a strong fragnance Thiru ? That could be the deciding factor.