I need to create a Global variable in autosys jil which give me the last day of previous month,

command: sendevent -E SET_GLOBAL -G "Blackrock_CASHFLOWdate=date ‘+%Y%m%d’"

The above command give me the current date ,how to get the last day of previous month?

For Example if i am running the job today which is on 06/27/2024 ,My GV should be created with the value “20240531”