java.lang.NullPointerException

http://www.linux.org.ru/profile/Selecter/show-topics.jsp?nick=Selecter

java.lang.NullPointerException
	at java.util.Calendar.setTime(Calendar.java:902)
	at java.text.SimpleDateFormat.format(SimpleDateFormat.java:780)
	at java.text.SimpleDateFormat.format(SimpleDateFormat.java:773)
	at java.text.DateFormat.format(DateFormat.java:314)
	at _show_22dtopics__jsp._jspService(_show_22dtopics__jsp.java:62)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
	at com.caucho.jsp.Page.subservice(Page.java:497)
	at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
	at com.caucho.server.http.Invocation.service(Invocation.java:312)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:342)
	at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:272)
	at com.caucho.server.TcpConnection.run(TcpConnection.java:137)
	at java.lang.Thread.run(Thread.java:536)