How to resolve improper date of birth data
There are different ways to deal with it:

Try to understand the reason of the error. Maybe in some cases people input data in the wrong fields.

Make an educated guess - for example 1843 could be 1943.

Consider these errors to be missing values.
My dataset contains incorrect date of birth entries. How do I resolve this?,since this data is important to my analysis as it will help in segmentation. E.g: a customer has a date of birth entry of 1843-12-21, which is clearly not proper. Similar issues are also present.
Thanks in advance.