Using the Date field

Using the Date field

Hi,

This is my first time working with Zoho creator (or any service of the kind, for that matter), your assistance will be highly appreciated. 

Some of my records have an exact date, and some only have a year. I can't seem to be able to use the "date" field, because it doesn't accept those with just a year as a proper date format. I would very much like to use the date to field for better search options, instead of just making it a one-line field (won't take numbers too, because then it says that 1.1.2014 isn't a supported number format).
Thanks,
Roy