from the code in strftime.c . This affects both the library code and all the commands using it (e.g. date +%s). Note that %s is not required by ANSI, but we've already got it in 1.1.5.1. Suggested by: luigi@labinfo.iet.unipi.it (Luigi Rizzo)
4.4. The code is almost identical to the 4.4 versions, but this organization should make it easier to merge new versions in the future.