Hi. Note that dvips honours SOURCE_DATE_EPOCH since https://www.tug.org/svn/texlive/trunk/Build/source/texk/dvipsk/output.c?r1=32653&r2=40885 so that suppress-dvips-creationdate.patch is not needed with TL2016.
Also, with SOURCE_DATE_EPOCH_TEX_PRIMITIVES=1, remove-tex-output-timestamp.patch is not needed with TL2016: year, month, day are the TeX primitives that can be set from SOURCE_DATE_EPOCH if SOURCE_DATE_EPOCH_TEX_PRIMITIVES=1. See https://www.tug.org/svn/texlive?view=revision&revision=40889 Regards, Alexis Bienvenüe.