org-tr-regexp-both

org-tr-regexp-both is a variable defined in `org.el'.
Its value is

"[[<]\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\} ?[^]
\n>]*?\\)[]>]--?-?[[<]\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\} ?[^]
\n>]*?\\)[]>]"

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

Documentation:
Regular expression matching a time stamp range.