How much outdoor play time do you aim daily for your LO?

My LO is 2 and I aim for 1.5-2 hours daily. We go out to the backyard in the morning after snack time and before lunch time. Around 10-1030.
In the afternoon we usually take a walk around the neighborhood about 4:00; before I have to start making dinner.

Hopefully these times will work well for in the heat of summer to avoid the hottest part of the day as well!