Create Document template | Dates get changed automatically when year is changed

Replication steps :
1) Open the dashboard
2)Click on create document template
3) check Does this form required an expiration date?
4) Enter "Valid from" and "Valid to" date manually eg : 12/01/2018
5)Then change the year manually to 1997
6) Observed that date and month swapped automatically to 01/12

Expected Result : When year is changed manually, date and month should not change or swap.