I have one question regarding as per tiltle...Can M7i support a time-based policy such as Cisco device? For example i want time "office hour" user cannot access internet. Hopefully someone can help me with evidence url. Thanks
You could configure different configuration groups, each having its own time condition, with a different firewall applied in each configuration group.
Details are here:
Example: Using Conditions to Apply Configuration Groups
Minimum version is Junos 11.3.