int history_write_timestamps
If non-zero, timestamps are written to the history file, so they can be preserved between sessions. The default value is 0, [...]
So this isn't true by default on many machines unless it is explicitly turned on.
I could find no command line history for Bash when I poked around. I use the fish shell, however, which does embed timestamp data by default - but I rarely think to look there when the detail might be pertinent. C'est la vie.
Aha now that makes some sense. I am a bash user— and I’ll admit my settings are OLD. So old I’ve forgotten the defaults entirely. Thanks for the reminder :)
I could find no command line history for Bash when I poked around. I use the fish shell, however, which does embed timestamp data by default - but I rarely think to look there when the detail might be pertinent. C'est la vie.