You've got all the pieces of Pawatuns' plate, so Diggy can wake them now. But you still have to get to their castle in the sky to do the ritual. They rule over the winds, after all. Are you sure you want to do this? Just asking ... 🤷♀️
In order to get into Sky Castle, Diggy needs to find the right path to the castle:

Once you pass the last bridge, you can wake the Pawatuns. In order to do so, please place all the pieces on the pedestals and do the waking ritual.
In order to reveal the pedestals, please pull the levers:

Then place all the pieces on the pedestals:

You will find locked doors. Each of the Pawatuns has his own room in the castle. They also have the keys.

Before those four asleep, they'd made a huge mess here! No matter, now Diggy and Pawatuns' priestess must perform the waking ritual, which also opens the bedroom door. It's secured, which is not surprising, given what Pawatuns are capable of.
To perform the waking ritual, Diggy needs to open the gate by using draggable stones. In order to get the draggable stones, please fix the pipes and pull the levers:



In order to open the gate, please place the draggable stones in the proper place.
Now, search the bedroom and talk to Pawatuns' priestess:

Diggy placed the pieces on the pedestals. Diggy performed the waking ritual. And yet... the room where the Pawatuns were supposed to be... is empty. So shady. Are they guilty of stealing another calendar piece? If they are, it must be somewhere here.