If you get on with someone, you like them and have a friendly relationship with them. The host fears the guests won't get on What are your neighbours like? Do you get on with them? = get along
grow late or (of time) elapse; "It is getting on midnight--let's all go to bed!"
"The news won't be on tonight" grow late or (of time) elapse; "It is getting on midnight--let's all go to bed!
If you get on with something, you continue doing it or start doing it. Jane got on with her work Let's get on