[BUG] SimpleDateFormat is not thread-safe #207
Description
SimpleDateFormat is not thread-safe. Ex: https://stackoverflow.com/questions/4021151/java-dateformat-is-not-threadsafe-what-does-this-leads-to
Suggestion: use FastDateFormat instead: https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/time/FastDateFormat.html