org-icalendar-date-time-format

org-icalendar-date-time-format is a variable defined in `ox-icalendar.el'.
Its value is

":%Y%m%dT%H%M%S"

Documentation:
Format-string for exporting icalendar DATE-TIME.

See `format-time-string' for a full documentation. The only
difference is that `org-icalendar-timezone' is used for %Z.

Interesting value are:
- ":%Y%m%dT%H%M%S" for local time
- ";TZID=%Z:%Y%m%dT%H%M%S" for local time with explicit timezone
- ":%Y%m%dT%H%M%SZ" for time expressed in Universal Time

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.