XPost: comp.lang.fortran, comp.lang.c++   
   From: ldo@nz.invalid   
      
   On Tue, 3 Feb 2026 10:33:55 +0100, Fred. Zwarts wrote:   
      
   > What I meant is that the calender should be added in the output.   
      
   The usual assumption (at least internationally) is proleptic   
   Gregorian, unless otherwise stated.   
      
   Also, this:   
      
       ldo@theon:~> TZ=UTC date -d 01-jan-0   
       Sat 01 Jan 0000 00:00:00 UTC   
       ldo@theon:~> TZ=UTC date -d 01-jan-0 +%s   
       -62167219200   
       ldo@theon:~> TZ=UTC date -d '@-62167219100'   
       Sat 01 Jan 0000 00:01:40 UTC   
       ldo@theon:~> TZ=UTC date -d '@-62167219300'   
       Fri 31 Dec -001 23:58:20 UTC   
      
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