Regular expression for validating date format mmddyyyy
The final two solutions are a little more complex, so we’re presenting these in both condensed and free-spacing form.The only difference between the two forms is readability. The final two solutions allow all of the date formats, just like the first two examples. “32/1/2010” , “32/01/2020” – day is out of range [1-31] 2.In this regex tutorial, we will learn to validate simple date formats e.g. Here, we want to use a regex that simply checks whether the input looks like a date, without trying to eliminate things such as February 31st.You want to use a simple regex that simply checks whether the input looks like a date, without trying to weed out things such as February 31You might think that something as conceptually trivial as a date should be an easy job for a regular expression. Because dates are such an everyday thing, humans are very sloppy with them. To somebody else, it may be the first working day of the year, if New Year’s Day is on a Friday.The other issue is that regular expressions don’t deal directly with numbers. That’s because the characters for the digits 0 through 9 occupy consecutive positions in the ASCII and Unicode character tables.
You can’t tell a regular expression to “match a number between 1 and 31”.
Let’s see some regex examples based on different requirements around date formats List dates = new Array List(); dates.add("1/1/11"); dates.add("01/01/11"); dates.add("01/01/2011"); dates.add("01/1/2011"); dates.add("1/11/2011"); dates.add("1/11/11"); dates.add("11/1/11"); String regex = "^[0-3]?