I have one TrueNAS 12 server with an encrypted pool and a slow CPU which takes more than 24 hours to do a scrub.
zpool status | grep scan
scan: scrub repaired 0B in 1 days 11:56:46 with 0 errors on Wed Dec 9 06:07:04 2020
This results in:
Failed conversion of 9-on-Wed_Dec'' using format %Y-%b-%e_%H:%M:%S''
date: illegal time format
usage: date [-jnRu] [-d dst] [-r seconds|file] [-t west] [-v[+|-]val[ymwdHMS]]