public static ZonedDateTime zonedDateTimeOf(final long time) {
        return zonedDateTimeOf(time, ZoneOffset.UTC);
    }
Utility for creating a ZonedDateTime object from a millisecond timestamp.

@param time Milliseconds since Epoch UTC
@return ZonedDateTime representing time
core/cas-server-core-util-api/src/main/java/org/apereo/cas/util/DateTimeUtils.java