determine an limited time for internet connection

hi every one
i have internet modem + rb951( as an internet wireless access point ) + my sun labtop
please …please
all i want /
give internet service to my sun from 8a.m to 8p.m once aday …so my sun can use internet from 8 a.m to 8 p.m in a day and he can not access internet after 8p.m unless he must wait to 8a.m next day …
how can i do that ??

which thing in mikrotik system can performe this scenario ..dhcp server ,system scheduler or anything else ???

i got it my self

/interface wireless access-list
add authentication=no forwarding=no interface=wlan1 mac-address=\
    B4:74:43:53:28:B7 time=20h33m39s-20h36m,sun,mon,tue,wed,thu,fri,sat

the time is just for example and it not for my final purpose