The "Time restrictions" = (acl within_timeframe time [days] h1:m1-h2:m2) can regulate the access on weekdays and on time (hours and minutes). Here you can specify whether queries in the indicated values are allowed or denied. By default, the access is allowed around the clock and seven days a week.
For server maintenance, this feature can for example be used. Even for online time arrangements in families, this feature can also be useful.