Coincidence?
$ TZ=UTC date --date=@$[$(date +%s)*2]
Wed 31 Mar 15:33:50 UTC 2077 $ TZ=UTC date --date=@$[$(date +%s)*2]
Wed 31 Mar 15:33:50 UTC 2077Perhaps something that is meant to add a delta to a timestamp accidentally adds 2 timestamps together.