public Date decodeTimestamp(long rawTimestamp) {
    return new Date(dateGranularity * rawTimestamp);
  }
Decodes a raw timestamp value into a Date.
<p>

@param rawTimestamp The PBF encoded timestamp.
@return The timestamp as a Date.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/osm/PbfFieldDecoder.java