I'm deciding on the best way to handle contact birthdays in my set-up. None of the options seem ideal, so I am interested in how others approach this. The aim is  to have a usable ui to track birthday without knowing or requiring the year. 

I'm currently leaning towards just saving Birthday Month and Birthday Day of Month as separate fields, although this going to be annoying with Zoho giving you so little control over field UI.  

The other option I considered, was to keep the Date of Birth field, but someone write over all the years with a dummy year (ie 2099 or similar) .

What are you doing? What are the benefits / drawbacks to your approach?