The phrase "siete y veintitrés de la noche" is a correct way to express the time "7:23 PM" in Spanish. Here are a few other ways to say it:
- Son las siete y veintitrés de la noche.
- Son las siete con veintitrés de la noche.
- Siete y veintitrés de la noche. (informal)
All of these options are appropriate for indicating that it is 7:23 PM.