Q:

When is my date of birth?

___4,_4,_4
This is my real date of birth, because it looks unique, I try to do a simple operation, and I get a number 222.
In fact it is able to solved without looking at the hint, but I'm trying to make this puzzle easy.
Hint:

 ??+?4+,?4+,?4 = 141

When is my date of birth? And how is the number 222 obtained
from the calculation results?

The main purpose of this puzzle is not just for someone to answer it, but I hope someone can also improve what is needed

A:

From the hint:

 We start from $??+?4+?4+?4 = 141$, or in better notation $AB+C4+D4+E4 = 141$.

 Taking everything modulo 10, we get $B+12\equiv1$, so $B=9$.

 Since $D4$ is a month, we must have $D=0$ (there is no 14th month).

 Assuming you're not from the distant past or future (e.g. born in the 10th or 30th century), we must have $A=1$.

 Now the equation is $19+C4+04+E4=141$, so $C+E=11$. We also know that $E$ must be $0$ or $1$ or $2$, so the only option is $C=9,E=2$.

So your date of birth is

 1994/04/24 or 24 April 1994.

If you want feedback, I would say that this isn't doable without the hint. Certainly not uniquely solvable, when you don't specify what types of operations are allowed. Following this site's generic advice on formation-of-numbers questions, I'd advise you to restrict the possible operations which are permitted to be used in getting from the birthdate to 222. E.g. is it just $+,-,\times,\div$? Are $\sqrt{},!,\lfloor\,\rfloor, \exp$ also allowed? You need to have a clear finite list, otherwise there are too many thinking-outside-the-box possibilities.

