In most non-common Law countries I believe, one of the three requisites however (at least in Italy, France and Spain) is that is should be (besides handwritten

In most non-common Law countries I believe, one of the three requisites however (at least in Italy, France and Spain) is that is should be (besides handwritten and signed) also dated "exactly" (day/month/year). A not-so-uncommon issue with holographic wills is that multiple versions may exist, in which case only the last one (date) is valid. Also, parts of a holographic will may be nullified if contrary to Law provisions, such as - an example - violations to the reserve share.