Translation:The date of the game is the first of February.
El primero de is the traditional way of saying "the first of," but el uno de is occasionally used.
I know it says "The date of the game is the first of February." But I was using the word pool rather than the keyboard, and "date" wasn't among the options. The best I could do was "The game is the first of February." Of course it was marked wrong, but I couldn't select what wasn't there. Reported as a technical glitch.
In speaking (in the US), many people put in a "st," "nd," or "rd." But, many others use only the number, especially when a year is included. I might say, "I'm going on the first of February, but would almost always say "That happened on February 1," and would say, "She was born on February 1, 2001." Speaking habits do bleed over into writing, but using only the number is the most formally correct.
You probably should ask someone else (younger) about this, though. I'm old and tend to do/say things the way I was taught back in the dark ages! :))
EDIT: Ryagon, you are sneaky. You asked a short, innocent-looking question and my sleeping brain obviously worked on it all night because I awakened with a somewhat (not completely) different answer. That is, the most appropriate answer for almost all questions: It depends!
First, it depends on where you live. Then, it depends on whether you are speaking (and to whom) or writing. And, it even depends on when you are speaking.
When you are speaking matters because, for example, on January 29, if I were trying to arrange a lunch date, I might ask "What are you doing on the first?" But, back in December, if I had been trying to arrange a meeting, I would have asked "What about February 1?" (not February first).
There may be some online resources that offer a more precise answer to your question. I haven't checked. But, as I recall, most grammar books limit discussion to correctly writing dates, not speaking them.
Finally, the number of DL discussion posts about dates attests to the accuracy of "It depends." I'm only happy that Duo invariably accepts "on February 1" for the translation of el uno/primero de febrero!