Here's a breakdown of possibilities:
1. "What day is it?"
* The response would be the specific day of the week:
* Oggi è lunedì. (Today is Monday.)
* Oggi è martedì. (Today is Tuesday.)
* Oggi è mercoledì. (Today is Wednesday.)
* ...and so on.
2. "What time of day is it?"
* The response would be the time of day:
* È mattina. (It's morning.)
* È pomeriggio. (It's afternoon.)
* È sera. (It's evening.)
* È notte. (It's night.)
3. "What day is it?" (referring to a specific date)
* The response would be the date:
* Oggi è il 10 maggio. (Today is the 10th of May.)
Please provide more context to your question so I can give you a more specific answer. For example:
* Are you asking about the day of the week?
* Are you asking about the time of day?
* Are you asking about the date?
Once you give me more information, I can help you with the correct response!