calendaryear "zeroity" is held by member
BC support to period start and end. Bug detected:
GregorianCalendar(inputdata.getDate()) makes mess due Date conversion
into localtime. See
http://localhost:8080/jkalender/jkalender?ts=m&date=1989-01-01&tz=Europe%2FTallinn&f=xcs&dt=1&mo=1&sl=1&sr=1&ge=1&ce=m&ar=1&lat=59.4426896&lon=24.75319719999993