private static int getEventTimeStandardFormat(final String searchText) {
        final String eventStandardText = StringUtils.substringBetween(searchText, "dtstart_", "\"");
        if (eventStandardText != null) {
            try {
                final Date eventStandardDate = EVENT_DATE_FORMAT.parse(eventStandardText);
                final Calendar calendar = Calendar.getInstance();
                calendar.setTime(eventStandardDate);
                return calendar.get(Calendar.HOUR_OF_DAY) * 60 + calendar.get(Calendar.MINUTE);
            } catch (final ParseException e) {
                Log.e("Cannot parse event time standard format", e);
            }
        }
        return UNKNOWN;
    }
find a text matching <a href="https://gcffm.de/eventstandard.html">standard event</a>
main/src/main/java/cgeo/geocaching/utils/EventTimeParser.java