pattern '(A|a) .+').
- Fixed bug #41844 (Format returns incorrect number of digits for negative
years -0001 to -0999).
- Fixed bug #41842 (Cannot create years < 0100 & negative years with
date_create or new DateTime).
- Fixed bug #41709 (strtotime() does not handle 00.00.0000).
- Fixed bug #41523 (strtotime('0000-00-00 00:00:00') is parsed as 1999-11-30).