Man pages matching name dclock in section 1:

dclock.1.en	debian 10 / dclock
dclock.1.en	debian 10 / ivtools-bin
dclock.1.en	debian 11 / dclock
dclock.1.en	debian 11 / ivtools-bin
dclock.1.en	debian 12 / dclock
dclock.1.en	debian 12 / ivtools-bin