You can try something like this:
EXEC jobs.sp_update_job
@job_name='Run Sample Job',
@enabled=1,
@schedule_interval_type='Days',
@schedule_interval_count=1,
@schedule_start_time='2021-09-21 11:00:00' (sets time to 4:00am PST, adjust time accordingly)
You can also read this article for more detailed information.