I'm reading Women by Charles Bukowski and stumbled upon the following dialog:
Dee Dee was standing next to me. "Please tell her," she said, "to give me until September."
"Forget her," Lydia said. "To hell with her. You come up here and see me."
"I can't drop everything just because you phone. Besides," I said, "I'm giving Dee Dee until September."
A little bit of context: the conversation is being held over the phone between the narrator and his ex-girlfriend Lydia who's trying to get him back. Dee Dee is the narrator's current date.
What do the characters exactly mean by saying to give Dee Dee until September?