date is expecting reference file

[hudecof]

Hello,

the date -r is expecting reference file.
I have got error

root@ns01:/srv/dnssec# bash ./dnssec-reverb sign  64.57.2.in-addr.arpa
zone 64.57.2.in-addr.arpa is ok
date: 1685813368: No such file or directory

dnssec-reverb/dnssec-reverb

Line 163 in 9aa8e24

TT=$EXPIRE; date -r "$TT" '+%Y/%m/%d %H:%M:%S' > "$KEYDIR/$ZSK.expire"

regards
hudecof

[hudecof]

should it be

 TT=$EXPIRE; date -d "@$TT" '+%Y/%m/%d %H:%M:%S' > "$KEYDIR/$ZSK.expire"