i want to print last moth last date with time stamp '23:59:59' using command : Below is my output but i want to get output like Apr 30 23:59:59 
please suggest
date -d "$(date +%Y-%m-01) -1 day"
Tue Apr 30 00:00:00 UCT 2019

I want below output 

Tue Apr 30 23:59:59 UCT 2019