I'm coming home late when the whole family has to wake up early tomorrow but my dad said that I could be out as late as I want
Did he give you an idea on what time to be home?
No, he doesn't specify the time and the earlier we go the more we could enjoy ourselves.
Seems like there is not really a time to be home at then. Bending the rules can be fun when you know that you won't be in trouble. You should try to be careful and not do anything crazy with your freedoms.
I feel my dad can be a buzzkill sometimes so this is great for me.
It is ok to bend the rules if your parents allow it. Just try not to get in trouble because you might not get the same freedom again if you do!