@NonNull
    public List<Image> getNonStaticImages() {
        final ArrayList<Image> result = new ArrayList<>();
        for (final Image image : getImages()) {
            // search strings fit geocaching.com and opencaching, may need to add others
            // Xiaomi does not support java.lang.CharSequence#containsAny(java.lang.CharSequence[]),
            // which is called by StringUtils.containsAny(CharSequence, CharSequence...).
            // Thus, we have to use StringUtils.contains(...) instead (see issue #5766).
            final String url = image.getUrl();
            if (!StringUtils.contains(url, "/static") &&
                    !StringUtils.contains(url, "/resource") &&
                    !StringUtils.contains(url, "/icons/")) {
                result.add(image);
            }
        }
        return result;
    }
guess an event start time from the description
main/src/main/java/cgeo/geocaching/models/Geocache.java