full moon on poorna amavasya??

it is told anamika treatment will end on poorna amavasya ans anamika is waiting for poorna amavasya but when jeet looks at sky full moon is shown...aur shadi bhi shown as taking place in night...dont able to understand these things---

full moon on poorna amavasya---

shadi at night and that too on poorna amavasya ke din...