how to Photon Server call this function sometime?

Hello every body, sorry my english was bad.

I have a issue, I want Photon Server auto send event or operation for client. Example 5h PM every day, the Server going to call event Lottery for client.

I was saw more topic about Photon Server in forum (auto update in Photon Server, how to create bots as players) but I dont have a answer that can resolve this issue. Help me.