feature request: date/time prompt of "hours/minutes ago"

[pinmacs]

Hi,

Syntax available for date/time prompt is very nice.

I would like to be able to use expressions for my timestamps such as -1h 
(1 hour ago) or -30m (30 minutes ago) or -1h30m (1 hour and a half ago) 
or +1h (in 1 hour)

Cheers,
pinmacs

[1]
https://orgmode.org/manual/The-date_002ftime-prompt.html

fallback link (this morning orgmode webpagewas not working) 
https://www.gnu.org/software/emacs/manual/html_node/org/The-date_002ftime-prompt.html