Multiple calendars

Hello,
Is there a way to have specifics days or hours in one calendar ?
I’ll try to make it clear !
I have
“Service 1” Monday from 9:00 to 13:00 and Tuesday from 9:00 to 18:00
“Service 2” Monday from 14:00 to 18:00 and Friday from 9:00 to 18:00
“Service 3” Thursday from 9:00 to 20:00

I know I can make this with separate calendar but I’d prefer, when I create a service, to have the choice for specific schedule.

ie.
Service 1 (I define the calendar, as it is right now)
Service 2 (a checkbox allows me to define a specific schedule or to set it as Service 1)
Service 3 (a checkbox allows me to define a specific schedule or to set it as Service 1 or 2)
…

And, last question, if I have only 1 service, is there a way to hide the select field ?

Best regards,
Renaud