To say the date in Spanish, you'll use a specific format. The core structure is: el + day of the month + de + month + de + year. Let's break that down.
The Basic Structure
Think of it like this: "the" + day number + "of" + month + "of" + year.
El: This is the definite article "the" in Spanish (masculine singular). It's essential when stating the date.
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Day of the Month: This is a number. For example, "one" (uno), "two" (dos), "three" (tres), etc. Usually, you use cardinal numbers (one, two, three...), except for the first day of the month.
De: This means "of" or "from". It connects the parts of the date.
Month: This is the name of the month: enero (January), febrero (February), marzo (March), abril (April), mayo (May), junio (June), julio (July), agosto (August), septiembre (September), octubre (October), noviembre (November), diciembre (December).

Year: This is the year number. For example, dos mil veintitrés (two thousand twenty-three).
Examples
Let's put it together. To say "January 1st, 2024" in Spanish, you would say:
El primero de enero de dos mil veinticuatro

Notice that "first" is primero, not "uno." It's the only exception.
To say "May 15th, 2023," you would say:
El quince de mayo de dos mil veintitrés

To say "December 25th, 2022," you would say:
El veinticinco de diciembre de dos mil veintidós
More Tips
Cardinal Numbers: As mentioned before, use cardinal numbers (dos, tres, cuatro...) for all days except the first. For example, "El dos de junio" (June 2nd).

Year Shorthand: Sometimes, you might hear or see a shorter way to say the year. For example, instead of "dos mil veintitrés," you might hear "veintitrés." However, it's best to use the full year number when you're learning.
Writing the Date: In some Spanish-speaking countries, the date is written in the format day/month/year (e.g., 25/12/2022). Be aware of this to avoid confusion!
Practice: The best way to learn is to practice. Try writing out today's date in Spanish and then dates of important events like your birthday or holidays.
So, remembering the format el + day of the month + de + month + de + year, you can confidently say the date in Spanish!