diary-time-regexp

diary-time-regexp is a variable defined in `diary-lib.el'.
Its value is

"[0-9]?[0-9]\\([AaPp][mM]\\|\\([Hh]\\([0-9][0-9]\\)?\\|[:.][0-9][0-9]\\)\\([AaPp][Mm]\\)?\\)"

• This variable may be risky if used as a file-local variable.

Documentation:
Regular expression matching a time of day.