Syntax:
{{GCD|id|year|month|day}}
{{GCD|id|{{subst:CURRENTYEAR}}|{{subst:CURRENTMONTHABBREV}}|{{subst:CURRENTDAY}}}}
{{GCD|{{Subst:#property:P850}}|{{subst:CURRENTYEAR}}|{{subst:CURRENTMONTHABBREV}}|{{subst:CURRENTDAY}}}}