I don’t know the name of this flower, but it has been my favourite since childhood. As a kid, I used to ask my father to get me these flowers. He would leave some behind, before leaving for office. After coming home from school, the first thing I would do is to find the flowers he left for me, and make a garland.
So here the flower, if you know the name, please let me know:

its called parijat in marathi.
Thanks, SB. I have finally been able to find the botanical name: Nyctanthes arbor-tristis (Night flowering Jasmine).