The PDC is an online conference. You can attend in your PJ’s if you want. It takes place on a forum. The duration is 2 weeks. During these 2 weeks, every day new presentations are posted on the PDC forum.
So you can attend from wherever you are in the world as there are no specific times you need to be online.
You also aren’t required to be 2 weeks there, but it is highly recommended as it is a very addictive high pressure kind of atmosphere. So you will want to keep up with everything. But nothing is compulsory, and at the end of the 2 weeks the conference forum stays open for another 2 weeks as read only, so you can still catch up with what you have missed