After-hours and Weekend Greetings . If your business closes after a certain time or on the weekends, and there is nobody to answer or assist your callers, create an after-hours automated attendant greeting. Tell your callers up front that the business is closed, and ask them to call back at the end.
To specify the Auto Attendant activity periods or schedule, you will need to create Auto Attendant menus. They can have different greetings and different users/hunt groups/other objects assigned to phone keys.

A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.
A good voicemail greeting is short and professional, lets people know that you’ll get back to them, and invites callers to continue engaging with a call-to-action. You should also show your personality if you’re in an industry or role that allows that. If your industry is more conservative, however, you’ll want to keep humor and personal touches to a minimum. A greeting Your name Your company A simple explanation for missing the call (e.g. you’re away from the phone or are on holiday) A rough estimate of when you’ll get back to the person An alternative person to reach out to (if you’re out of office) An alternative mode of communication (if you prefer email or text) A call-to-action such as “Leave a message” or “Send me an email at [email protected]”