Time quota to access some sites

I would like to allow access to some sites only for some period of time. For example, 1 or 2 hours per day. The time quota could be used not in one piece, but in many chunks - 10 minutes now, 15 later, etc. The size of chunk could be defined by 5 minutes for example.

Is it possible to do this with Mikrotik? How?

Thanks in advance for any advices.

With some ‘workaround’ you can do it.

First make an address list which should have target web site ip addresses (it can be a bit tricky but you can use already available scripts that fetches ip addresses from the dns cache on a scheduled basis & add it to the specific address list) and then make a filter rule (in Forward Chain) which Block requests going to this address list via destination address list. also there is a TIME option in the rule so you can select time in which these rules should be enabled. Look for ‘TIME’ option.

TIP: 
You can also use script+scheduler combination for more customized control.