Format birthday as BDAY;VALUE=DATE:YYYY-MM-DD. Fixes oc-1276.
Format birthday as BDAY;VALUE=DATE:YYYY-MM-DD. Fixes oc-1276.

pollopolea/core,xx621998xx/server,jbicha/server,cernbox/core,xx621998xx/server,endsguy/server,pmattern/server,andreas-p/nextcloud-server,jbicha/server,owncloud/core,Ardinis/server,owncloud/core,pixelipo/server,cernbox/core,michaelletzgus/nextcloud-server,pixelipo/server,lrytz/core,andreas-p/nextcloud-server,IljaN/core,jbicha/server,Ardinis/server,pmattern/server,lrytz/core,owncloud/core,pixelipo/server,whitekiba/server,michaelletzgus/nextcloud-server,pixelipo/server,pollopolea/core,nextcloud/server,endsguy/server,IljaN/core,lrytz/core,owncloud/core,bluelml/core,sharidas/core,IljaN/core,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,sharidas/core,michaelletzgus/nextcloud-server,lrytz/core,lrytz/core,whitekiba/server,endsguy/server,pmattern/server,whitekiba/server,Ardinis/server,nextcloud/server,endsguy/server,cernbox/core,endsguy/server,IljaN/core,bluelml/core,jbicha/server,andreas-p/nextcloud-server,sharidas/core,cernbox/core,nextcloud/server,jbicha/server,pollopolea/core,pixelipo/server,sharidas/core,phil-davis/core,whitekiba/server,pollopolea/core,cernbox/core,IljaN/core,pmattern/server,owncloud/core,andreas-p/nextcloud-server,xx621998xx/server,Ardinis/server,bluelml/core,nextcloud/server,whitekiba/server,xx621998xx/server,xx621998xx/server,sharidas/core,Ardinis/server,bluelml/core,bluelml/core,pollopolea/core,pmattern/server