why date('d/m/y',strtotime(return_time()) not working in php -

i've function, sends current date , time of asia region

function return_time() {     if(function_exists('date_default_timezone_set'))     {         date_default_timezone_set('asia/kolkata');     }     return date('y-m-d h:i:s a'); } 

and i'm trying show today's date user, don't know i'm doing wrong, here i'm doing

echo date('d/m/y',strtotime(return_time())) 

here i'm getting in output

01/01/70 

having a formatter in date() outputs invalid date string causes strtotime() return false causes date() think 0 equates unix epoch jan 1, 1970.

the a necessary since time in 24 hour format. remove it.

i don't know why have convoluted, though. if want print out today's date do:

echo date('d/m/y');