If your business is closing on one of its normal operating days for a holiday, or is dealing with an emergency or unforseen situation, you should update your after hours announcement to avoid confusion.
Offer other contact information such as a cell phone or email address if you will check it (i.e. on vacation). DON’T: Be too informal, even if you are creating a humorous message. Give a prolonged sales pitch in your voicemail greeting message. Waste a caller’s time with an excessively long greeting before they can leave their message.

While covering all of the relevant information, aim to keep your voicemail to about 20 seconds. You definitely should not ever record a business voicemail longer than 30 seconds, and anything less than 10 seconds will typically mean that you are either speaking too quickly or aren’t providing all of the required information.
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]”