renewal period

[kit]

If I don't my domain name to be remove from the root zone file, how many 
days in advance do I have to renew my domain name before it expires?  My 
domain name expires on 3/24/01.  I renew it on 3/23/01, one before it 
expires.  Actually, more like two days assuming it gets deactivated on 
3/25/01.  Anyway, I can't seem to access my domain name anymore!!!

--Kit