What is 24 an hour annually?

"24 hours annually" is a nonsensical phrase. There are 8760 hours in a year (24 hours/day * 365 days/year). There's no context where "24 hours annually" would accurately describe a quantity of time. It's likely a misphrasing or a typo.

To help me give you useful information, please clarify what you meant to ask. For example, did you mean:

• Something that happens for 24 hours a year? (This would be a specific event or period.)
• Something that happens for a certain number of hours annually? (Specify the number of hours)
• Something that happens 24 times a year? (This would be a repeating event.)

Providing more context will allow me to give a relevant and helpful answer.