get the most recent scheduling time before a certain point in time

[liyiopener]

Could provide a method to get the most recent scheduling time before a certain point in time, be like
cron: 0 19 * * *
now time: 2025-03-08 17:00:00 +0800 CST
find the most recent scheduling time: 2025-03-07 19:00:00 +0800 CST