Backup window doesn't specifically ask for the time when to start take backup but instead ask for time period in which aws can trigger backup. So basically it's asking for backup window time
. That's why it has 2 fields
1. StartTime:
When can the process of backup be started.
2. Duration
: time window in which process must start to take backup.
E.G
if I set start time:
5:30 and duration:
30mints
Backup can start at anytime between 5:30 to 6:00.