Originally Posted by
Fl1ingfrog
Logging the times of the start and stop is a convention in place for all of my 50 years experience.
There has never been a requirement for it (nor mention of it) under either UK or European regs during my entire career from 1885 onwards, and in any case it would make the logging of many types of flying quite impossible if it were. I have seen some FOs do it but its quite pointless imo.
In any case where would you enter it? There's no room for that sort of detail in any of my logbooks except in the remarks column which should be reserved for - er - remarks!