We are not finding firstDay of month. How to open given month calendar

[GaneshPatidar123]

Hello
We have a query regarding how I can set the calendar with a start date and end date according to open.
We are given 2 dates and how to set the according to the start date month open the calendar and scroll also worked with the given end date month.

We are facing the below error.
org.joda.time.IllegalFieldValueException: Value 31 for dayOfMonth must be in the range [1,30]: year: 2022 month: 4
We set the other month and year that time we get the above error.

Please suggest how to set the custom date according to work. How I can open another date month? Its directly opens the current month.