Hebrew date diary entries must be prefaced by `hebrew-diary-entry-symbol'
\(normally an `H'). The same diary date forms govern the style
of the Hebrew calendar entries, except that the Hebrew month
-names must be spelled in full. The Hebrew months are numbered
+names cannot be abbreviated. The Hebrew months are numbered
from 1 to 13 with Nisan being 1, 12 being Adar I and 13 being
Adar II; you must use `Adar I' if you want Adar of a common
Hebrew year. If a Hebrew date diary entry begins with