Regular Expression date validation error

I'm very new in regular expression and I'm trying to validate date using following regular expression here:

^[1-3开发者_开发技巧1]\.[1-12]\.[1999-2005]$

but I'm getting an output as "invalid reguar expression"

Could anyone please tell me what's wrong I'm doing in above regular expression?

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Regular expressions can't match ranges of numbers, like you're doing with [1-31]. It can only match ranges of characters. You would need to match [1-31] as ([12]?[0-9]|3[01]) instead—it's not the most friendly thing in the world.

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You can use:

[0-9]{2}.[0-9]{2}.[0-9]{4}

or

^(0[1-9]|[12][0-9]|3[01]).(0[1-9]|1[012]).(19|20)[0-9]{2}$

both will match your date but wont validate it. I doubt that regular expression is a good way to validate a date due to the fact that you must check between 30 and 31 and also 28 plus leap years.

Probably there is a regular expression which handle all combination including leap years. But I recommend to use the existing function of your environment.

For example with PHP use checkdate() or the date class if you use Ruby.

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try this:

^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9]{2}$

it can match following strings~

12.12.1999
12-12-1999
12 12 1999
12/12/1999

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I do that, it worked perfectly ...

for(var i=0; i<100;i++){
    if( /^([1-9]|[1-2][0-9]|[3][0-1])$/.test(i) ) {
        console.log(i);
    }
}
// display only the range of 1 to 31 and disregards the 32-100