W3C standards are written with technical completeness in mind rather than education

ease of use

If every programmer had to be concerned with how disk drives work, and with all the dozens of things that can go wrong when reaing a disk block, it is unlikely that many programs could be written at all.
Andrew S.Tanenbaum

when is the next Friday Ocober 25?

y=2005; while [ $y -le 2020 ];do cal -m october $y;y=$(($y+1));done|grep '21 22 23 24 25 26 27' -B5